Other than the troika line being the slowest of all the heavy swords (oh, by the way, avenger and faust attack at the same speed as each other; Troika is considerably slower) and does normal damage (nothing resists it), the main difference is the charge attack.

Pro:
- Influcts stun on charge attack
- No type-weaknesses

Con:
- Slowest heavy sword
- No type-strengths
- Khorovod no longer has area of effect.

Other features:
- Normal damage: doesn't do greater damage vs any monster than faust/avenger on a neutral monster, but it doesn't have any weaknesses as far as that goes.
- Charge attack lunges you forward 2 squares and has a forward range of 3 squares from where you stop. Contact with you does extreme knockback on your target and chance of stun.

The movement from the charge attack can be okay vs 2-3 monsters, but if there are too many of them, it can get you hurt.
The Khorovod (current final troika) used to have an area of effect with rocks that spawned randomly around you that do damage and chance of stun, but it's gone now, so it's lost 3/4 of its total damage output and an important (yet unreliable) safety guard.

As much as I loved my troika, I can't really recommend it in its present form -_-;