You probably wouldn't like the game anyways, it's not an RPG.
Well, actually, it was.
Level upping characters, merchants, xp points, etc.
Plenty of RPG elements for sure anyways.
The closest to X-COM I've experienced was Fallout Tactics(for PC) which was deeper but without research or aliens, unless mutants count as aliens.
UFO Aftermath and Aftershock were ambitious duds, the more recent one came very close to light the torch again but in the end it's just so boring. I do consider them sequels to UFO: Enemy Unknown, which was X-COM in Europe(and, oddly, in Canada - Qc - as well).