Beauty of Joseon vs Round Lab: Which Sunscreen Wins?
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Ask for a Korean sunscreen recommendation anywhere and two names come back almost every time: Beauty of Joseon Relief Sun and Round Lab Birch Juice. They sit at the same price, both wear light, and both have a wall of fans, which makes choosing between them oddly hard. The good news in a Beauty of Joseon vs Round Lab decision is that you can’t really lose. The useful news is that they aren’t the same sunscreen, and the difference is easy to match to your skin once you know where to look.
TL;DR: Beauty of Joseon Relief Sun and Round Lab Birch Juice are both SPF 50+ PA++++ with modern broad-spectrum filters, so protection is effectively a tie. The real split is finish. Beauty of Joseon uses four filters in a rice and probiotic base that reviewers call light and slightly dewy; Round Lab uses two filters in a birch sap and hyaluronic acid base that feels more like a plain moisturizer. Dewy, glowy skin tends to prefer one; dry or fuss-free skin tends to prefer the other. Pick by finish, not by a ranking.
Protection is effectively a tie
Start with the part people worry about most, and it is the part that separates them least. Both are labelled SPF 50+ PA++++, the top of both the SPF and the UVA scales sold in Korea, and both use modern broad-spectrum filters rather than the older set US sunscreens are stuck with. On the measure that matters most, how much UV they are designed to stop, a Beauty of Joseon vs Round Lab matchup is a genuine draw. Neither is the “stronger” sunscreen, and anyone who tells you one out-protects the other is guessing.
What actually decides your protection is using enough and reapplying, not which of these two you buy. So the choice comes down to which one you will happily wear a full layer of, every day.
The filters: four versus two
Here is where they differ on paper. We pulled both ingredient lists to see the actual filter sets.
| Sunscreen | UV filters | Base |
|---|---|---|
| Beauty of Joseon Relief Sun | Four: Uvinul A Plus, Uvinul T 150, Tinosorb M, Iscotrizinol [1] | Rice extract, probiotics |
| Round Lab Birch Juice | Two: Uvinul A Plus, Tinosorb S [2] | Birch sap, hyaluronic acid, niacinamide |
Four filters versus two looks like a mismatch, but it isn’t a scorecard. Both lists reach broad-spectrum coverage; Beauty of Joseon simply splits the job across more specialists, while Round Lab uses just two filters that each cover a wide range, including the very broad Tinosorb S. More filters can make a formula easier to tune, but it doesn’t automatically mean stronger protection, since both already hit SPF 50+ PA++++. If you want the full plain-language tour of what each of these filters does, we wrote a guide to Korean sunscreen filters.
The finish is where they split
This is the difference you will actually feel, and it comes from the base, not the filters. Beauty of Joseon’s rice and probiotic formula is the one reviewers reach for the word “dewy” to describe: a light, faintly glowy finish that flatters normal and drier skin and sits well under makeup for most people. Round Lab’s birch sap and hyaluronic acid base feels more like a straightforward moisturizer, hydrating and low-key, without much glow. Neither is greasy, and both are comfortable; they just land in different places on the matte-to-dewy line.
That single difference drives most of the “which is better” arguments online. People are usually not disagreeing about protection. They are describing which finish their skin liked.
Which one for your skin
- Lean Beauty of Joseon if your skin is normal to dry, you like a dewy or glowy finish, and you want something that layers nicely under makeup. The rice-and-probiotic feel is the draw.
- Lean Round Lab if you want a plainer, moisturizer-like layer with less glow, your skin runs dry and just wants comfort, or dewy finishes tip you into looking shiny. It’s the more neutral of the two.
- Very oily skin? Both can feel a touch too comfortable in peak summer heat. Neither is a true matte sunscreen, so if shine control is your priority, our oily-skin guide points at better-matched formulas.
The pick, by preference not ranking
There’s no winner to crown here, which is the honest answer a Beauty of Joseon vs Round Lab comparison lands on. Buy the finish you want to wear every day, because the one you’ll actually reapply beats the one you admire in the cabinet.
- For a dewy, glowy finish: Beauty of Joseon Relief Sun. Light, rice-and-probiotic, the crowd favorite for normal-to-dry skin. Check price
- For a plain, hydrating finish: Round Lab Birch Juice. Moisturizer-like and low glow, easy for dry skin and anyone who dislikes shine. Check price
Still deciding between more options? Our complete Korean sunscreen guide puts both in context.
FAQ
Which is better, Beauty of Joseon or Round Lab sunscreen?
Neither is better on protection. Both are SPF 50+ PA++++ with modern broad-spectrum filters, so they tie on UV defense. The difference is finish: Beauty of Joseon is lighter and dewier, Round Lab is more like a plain moisturizer. Pick by the finish your skin prefers.
Do Beauty of Joseon and Round Lab use the same filters?
No. Beauty of Joseon Relief Sun uses four filters (Uvinul A Plus, Uvinul T 150, Tinosorb M, Iscotrizinol), while Round Lab Birch Juice uses two (Uvinul A Plus, Tinosorb S). Both reach broad-spectrum SPF 50+ PA++++, so the different counts do not mean one protects more.
Which is better for oily skin?
Neither is a true matte sunscreen. Both are comfortable, slightly moisturizing formulas, so very oily skin may find them a little dewy in heat. If you want shine control, a sunscreen built for oily skin is a better match than either of these.
Which is better for dry skin?
Both suit dry skin well. Round Lab Birch Juice is hydrating and plain, which very dry skin often likes, while Beauty of Joseon adds a dewy glow. Either works; it comes down to whether you want a glowy finish or a neutral one.
Sources
Ingredients and filters (verified 2026-07-24):
[1] Beauty of Joseon Relief Sun: Rice + Probiotics, INCIDecoder (SPF 50+ PA++++; filters Uvinul A Plus, Uvinul T 150 / ethylhexyl triazone, Tinosorb M, Iscotrizinol; rice extract and probiotics): link
[2] Round Lab Birch Juice Moisturizing Sunscreen, INCIDecoder (SPF 50+ PA++++; filters Uvinul A Plus and Tinosorb S; birch sap, hyaluronic acid, niacinamide): link
