Hi!
What is the better choise?
GMMK with silent reds and good quality keycaps or the Ducky Shine 7 / Ducky One 2 with silent reds and original keycaps.
Maybe other ISO recommendation?
The GMMK has pretty mediocre stabilizers, like most keebs. (Mediocre as in louder than usual.)
The GMMK Mini (60%) has silencing stuff built in, and better stabilizers. I think the normal GMMKs got updated too.
(Also, I would not reccomend Silent Reds, heard they feel mushy at bottom out.)
Many (all?) of the Ducky boards have PBT keycaps stock, so they should be much better than the thin, ****ty ABS Corsair caps. I can't speak for the thickness, but I can't imagine it being thinner than the cheap caps Corsair uses. (Using Corsair as an example in this situation.)
I would personally go with the GMMK, hence it is hotswappable, but keep in mind that the Ducky has way better build quality, its like a f00kin tank!
