The PowKiddy RGB20S has released but I'm going to safely assume that it's a bit of a downgrade from the original RGB20 just like the RGB10S was an uninspired slapped together upgrade that was really a step backwards.
I was going to do a review on the RGB10S but it's such an underwhelming experience, I decided to not even bother with it. It's basically just going to sit on my shelf permanently. $79.99 isn't necessarily a terrible price for this one but you can do better at that that price point today.
Just from photos, the RGB20S looks like a poor design with buttons and sticks too close to each other to be comfortable and the build quality looks to be pretty cheap too.. possibly worse than the RGB20 build quality. Regardless, the RGB20S gets a hard pass from me.