I don't think majority of smaller population servers differ much from each other. I play mostly on Vilya, and it's obvious that more experienced players are moving on, either playing other games and logging rarely, or quitting altogether, which makes passing knowledge and know-how to newer generations harder. There is also a trend where higher ranks prefer to solo or play in smaller (exclusive VIP ) groups, rarely stepping up and leading bigger groups and taking in greener creeps/freeps. Some are afraid of failure for some reason, and some just don't enjoy raiding, which is fine (it's their money/time), as long as they don't complain about "zerging". Ergo, new player circulation is very limited on smaller servers, and it's obvious that PVP in Lotro today is more centralized on bigger servers than ever.
Vilya: Healadder (defiler, R10), Kommisar (stalker, R7).
Snowbourn: Superserial (warleader, R8), Steelstack (reaver, R6).
Brandywine: Manvet (champion, R10 - Retired); Stargash-1 (reaver, R12)