It’s not just ships. I am Omega, but I also have an Alpha account that I log into and notice entire swathes of skills menu options unavailable. My Alpha can rat in a pretty good Gnosis…though even that does not have ( and cannot have ) the same level of DPS or EHP or range, etc that an equivalent ship has in Omega.
No idea what that is, sorry, I cant make it out on my phone
Long and short of it is I went Alpha thanks to the price increase and Im still doing the things I did as Omega except without losing isk on PLEX or risking expenisve ships, so I really dont get the big deal or what Im supposed to be missing out on.
Whether it is worth or not depends on what you want to do and whether alpha can do it at all I guess. I find alpha enough although I would go omega right away, as the benefits are just too big, if only I saw CCP to do at least something right. Till then I stay alpha.