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LevelSteam
Jan 4, 2017
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The shortest explanation is that DSA is a flat, uniform height pattern across all the keys while SA profile is sculpted with different heights for the rows. If you look at the pic I attached, DSA is the first profile listed, while SA is the fifth. There are exceptions to this, such as that 1976 kit in your first picture which looks like it's all Row 3 SA. This means that all the keycaps are the same height rather than being sculpted, but they're still taller than a DSA set.
The other thing that makes DSA and SA different from other keycap types like OEM or Cherry Profile is that most other profiles are cylindrical, meaning the indentation on the keycap is, well, cylindrical. It's higher on the sides and lower in the center and on the top and bottom. DSA and SA are spherical though, so they're highest at all the corners and have a spherical indentation that's lowest in the center of the key.
Some people prefer the sculpt and the height of SA caps (I know I do), while others like DSA due to the lower keys and uniform profile (I don't, mainly because it feels like I'm typing on my laptop). It's really all personal preference though. Other than that SP SA sets are mostly high quality, double-shot, thick ABS which feels fantastic to type on. Recently they've made a couple sets (Ice Cap and Industrial) available on PMK that are dye-sub PBT in a uniform, row 3 SA profile. I haven't used those though so I can't comment on their feel or quality.
Hope this helps.
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Jan 4, 2017
muni_chang
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muni
Jan 4, 2017
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LevelSteamthanks a lot~
Jan 4, 2017
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