http://wiki.spiralknights.com/Sudaruska
Which one is better in your opinion? I'm only considering getting the Sudaruska now as a normal damage dealing weapon.
My thoughts and positions on things:
I'm fond of the Sealed Sword lines and their 2-hit swing.
The Sudaruska might be better used both as a PvE and PvP weapon.
The Leviathan Blade that I own has a Gremlin Damage Bonus: Low UV. Horrible UV in my opinion.
Considering vendoring my Leviathan Blade like I did with my Fang of Vog and Sentenza just now.
The Charge on the Leviathan Blade is considerably better, but I don't charge my weapons all that often, except if it's with the Divine Avenger, Argent Peacemaker, Voltech Alchemer or Barbarous Thorn Blade from time to time.
I should also mention I have tried comparing Attack Speed between the Troika lines and the Sealed Sword lines. I honestly cannot see a difference between the two in attack speed despite people telling me there is. Both tried with Max ASI and no ASI.
Try doing the full 2-hit combo and trying to shield afterwards with both heavy sword lines. The troika line should be noticeably more vulnerable afterwards. This also applies to the first hit, but since there's more ending lag on the second swing of a heavy sword, it's much more noticeable seeing it there. Even that aside, try holding shield through the charge attack - You can move much earlier after the sealed sword's charge.
If you like the heavy sword playstyle (rather, since you mentioned sealed sword lines, I'll assume you have a DA and/or GF) or more specifically, the sudaruska's charge, I will admit that it's a LOT of fun in PVE.
As for PVP, I'm still a little meh about sudaruska- I DA's elemental and GF's shadow damage to be much more useful workarounds to getting though peoples' armor (ex: I'll use GF versus Vog and DA vs most everything else). Sudaruska's charge is a fun way to harass a shielding guardian though - if you've dealt a bit of damage to the shield already, the 2-hit charge can be pretty useful surprise damage. And of course, Sudaruska's lower attack speed still throws me off since it's more vulnerable than the other heavy swords :(