I've got a Witness compact .40, in what they call "wonderfinish". Yeah, the EAA marketing guys have their heads up their a$$es. Anyway, its supposed to be a heat treat process, similar to Tenifer, looks like matte stainless, pretty nice. Its also very tough and corrosion resistant, Ive been using mine as a carry gun, IWB, no hint of rust or wear. I'm happy with the gun, especially for $300. I've only fired about 500 rounds, flawless so far. Only issue is the trigger, SA is OK, but no where near a good 1911. I carry condition 1, and don't care about the DA. Need to see a smith, and see if it can be worked on on the cheap.
The only CZ compact I've handled was in the polymer finish. Supposed to be tough, but I didn't care for it. I understand the nickle ones and polished blue are real nice looking. The frame to slide fit on this one was perfect (Witness not quite as good), but the Witness trigger was a bit better. Take your pick.
As to EAA quality, do a search on this forum, there are some posts about parts failures due to poor heat treat. Supposedly Tanfolgio quality has improved considerably in the last few years, I've never had any problem with mine, but its nearly new. EAA customer service also may be spotty, I've seen some real favorable posts here, others bad. The exterior of my guns are well finished. Insides good where it counts, there are some machine marks on the inside of the slide.
Witness compact is available in 9mm, 40, 10mm, 38 super and 45. Also a polymer if you prefer, I have that in a .45, prefer the steel one. Hope this helps.
Bri