The question is... who will you fight? Both SB and Berserker are good against almost every class. A tank, gladi, tyrant or Destroyer can make a Zerker have a hard time... on the contrary, SB can handle them easy coz you root/slow/poison/nuke etc etc. On the contrary, Archers make SB suffer a little bit with a stun shot/kite thing... but zerkers are better to handle archers.
PVP between kamaels... zerker. No doubts about it.
Best way to beat heavy armor and some lightarmor types that don't use ranged attacks as much is to stop them from moving and do damage from out of reach. This is more towards the SB's area
Best way to beat robe/light armor types as most of those are ranged attackers already is to get in close as fast as you can. This is more towards the berzerker area.
Exceptions WILL occur though
Personally, i don't really fear zerkers that much as gladdie but i do always take them seriously and respect them. I've never faced an SB in any form of combat but the stuff i heard about 'em doesn't make me eager to fight 'em either, lol.
Best way to beat robe/light armor types as most of those are ranged attackers already is to get in close as fast as you can. This is more towards the berzerker area.
SB also have Rush skill - from first prof. For geting close is enough, but zerker have rush+stun.
Now having fun with 5x SB. Still trying find out on which situations root is good. 1vs1 pvp, I don't think so because nuke skill reuse is pretty long ... Maybe for catching kite classes.