OSI Trammel vs. Felluca?
TRAMMEL
No PVP (other than guild mates) in trammel. (No fighting, snooping, stealing, or anything against another player, period)
No looting of other people's corpses or their kills. Even if their corpses are bones! (Simply won't allow you to)
Haven is newbie town and has a different layout than Ocollo. (DIF Files)
Dungeon Khaldun can't be accessed here.
Recalling across T2A or to T2A is allowed.
Faction stones not accessable.
Felluca
PVP allowed (Faction, WAR, PK, whatever), stealing, snooping, etc.
Looting of player corpses and others kills (may turn you grey)
Ocollo is normal map / statics.
Dungeon Khaldun can be accessed in T2A in Fel only.
Can't recall into or across T2A at all, have to use teleporters (fairly recent)
ALL Faction stones are located in FEL as well.
That's about all I can think of. Other than a few DIF files, the map is the same, just some of the rules change...