Agreed, I’ve got a G19 and it is considered compact while the G17 is the full sized 9mm. There’s also a G26 subcompact. Since these are all “in family” as 9x19 Luger, double-stack polymer framed, striker fired pistols... There are really only two distinguishing characteristics: barrel length and magazine capacity.
As 9mm’s go, I love my G19. It’s an older model, but always works fine. Been carrying it for years. Never failed me.