Some people say Zenith because it has a on/off asa and a zero system which Ive heard is basically nothing really. Zero system and on/off asa is the only difference between blitz really.
I have the Blitz and I love the gun for being my first electronic, its easy to take apart/tun and azodin has youtube videos of break downs. The asa on/off cost $25 on ansgear. There is no recoil on this gun
Koas is just a semi no electronic soo ya. But I choose Blitz because I can just buy a on/off asa and My gun doesnt leak so I don't need to turn the air off at all and Compressed air should only be used with these guns
Luxe 2.0 with virtue oled, Team Damage cp 45/45, V3 rotor, freak kit, Sly's, Dye i4's, 4+5 pack.