Hi! We're from Barcelona, Spain. CRT and TFT are display times, because these versions are supposed to be included in Windows PC based arcade machines with a 4:3 display ratio screen. TFT are the modern flat ones, and CRT are the old huge bulky ones (cathodic rays instead of liquid displays).
The game demo itself is just the same. By pressing the F7 key you enable or disable a CRT effect, that we implemented to simulate the look of classic old CRT displays on a modern TFT. The difference between both versions is that the one for CRT displays has this effect disabled by default, when the other one has it activated by default.
I splitted it into two versions because here we wanted to allow the #Arcadecon2019 (an event for arcade related associations, arcade collectors, arcade game devs and related press) people to test it in a CRT display because we don't have any CRT available here right now, but we plan to release an arcade version with CRT display too.