hi folks, i'm new to the US forums as a poster but ive been a regular reader for a long time. this thread caught my interest since nobody seems to have calculated the stuff you're all asking for out to much detail? I did it a while ago in DE forums and id like to share my thoughts with you.
damage formula is:
DMG + 2*Skill%*DPS
(a factor for "own patk vs. enemy pdef" does apply at the end in the wild, but does not make a difference in comparison of the pure weapon's) - for details please ask "andreasels" or take a look in the ENEU forums to his posts, i dont want to recap the formula part entirely just in case someone has doubts about it, ask him, its his, hes the real numbercruncher (and around here on the US Forums anyway).
where DPS is DMG/Speed.
DMG is mainhand weapon damage and will be modified by any +damage blind/ghost stats (if thats the correct word for it, dunno, did not post many rom related posts in english so far, bear with me

), damage increases by % are always the same so we do not need to take them into account. (12%+192 from Dooms food we only need the 192 part, the 12% would in the end be the same for both weapons, we're going after the stuff that makes a difference)
Speed will obviously be increased by everything that increases our attack speed (sic!)
This is now where the fun begins, get ready for a lot of numbers.
As you will see, this is calculated for current endgame gear (what i see on some really hardcore DE/ENEU tanks and what i personally aim for,too - i am not yet complete ;-)) and really high pimped. If something does not work out for US Servers, just switch out the numbers and press enter again, every detail is there.
Itempreview really helps getting it done.
Those who do understand german may also take a look
here, its been there for a while.
Everyone else, lets go:
formula: [DMG]+2*[Skill%]*[DMG] /[Speed]
Details:
[Speed] = Speed*Speedbuffs
Speed: 3 (Juggler) // 2,4 (Black Energy)
Speedbuffs: 0.75*0.75*0.9*0.95*0.94
=> Strong Stimulant, Lute, Fire Training, Pet, Raid VI Rune
// Knight/Rogue: add *0.913 because of
Nimble Hands maxed. (8,7%)
[DMG] = weapon damage +damage ghost stats + rune damage + fixed pdmg from food
5715.6 t10+16 HD // Black Energy
7446.2 t10+16 HD // Juggler
regarding +16: we only had this stuff once so far, and only in packages with only 1(!) stone combined with partial useful and partial crap stuff depending on package. The Aussies had the real packages, dunno about you US folks so far.
bonuses:
420
Ardmond's Plate Armor t8+16 HD
481.2
Annelia's Right Hand t8+16 HD
115.2
Wrath VI(HD)
192
Doom's Banquet fixed part
[Skill%] = Holy Strike 67 , Knight/Scout 348% , Knight/X 255.4% => 3.48 and 2.554
(actual maxdmg-values without patk/pdef influence should be 12% percent higher for each sword in the end, since we did not take the 12% from Dooms Banquet in, just the 192 fixed damage - though it matters not for getting a view of the difference, 4% will still be 4%)
Knight/Scout (higher Holy Strike damage):
8654.6+2*3.48*8654.6/(3*0.75*0.75*0.9*0.95*0.94)= 53068.4570
6924.0+2*3.48*6924.0/(2.4*0.75*0.75*0.9*0.95*0.94)= 51339.909750
=> Juggler 3.36% better
Knight/Warrior/Priest/Mage (normal Holy Strike damage):
8654.6+2*2.554*8654.6/(3*0.75*0.75*0.9*0.95*0.94)=41250.2870
6924.0+2*2.554*6924.0/(2.4*0.75*0.75*0.9*0.95*0.94=39521.1935
=> Juggler 4.375% better
Knight/Rogue(passive speed) :
8654.6+2*2.554*8654.6/(3*0.75*0.75*0.9*0.95*0.94*0.913)=44356.33825
6924.0+2*2.554*6924.0/(2.4*0.75*0.75*0.9*0.95*0.94*0.913)=42627.3883
=> Juggler 4.055% better
If you go even further down the "insane gear and buffs" lane you may take more stuff into consideration as in:
Wrath 7 / Raid 7 instead of 6/6
Lvl65 Pdmg Food (260 instead of 192 fixed part)
+Damage from Ardmond and Bone Setbonuses (or from Demon Beast Set instead of Bone)
add on top "Soldiers Charge" (upgraded Fire Training and stacks w/ everything)
this further reduces the difference between the Swords to about 2.5% instead of 3.36% on a Knight/Scout.
TL,DR of everything: Juggler IS better, but buffed difference is smaller than it initially seems. Difference is small enough to choose any of both depending on what suits you better or is affordable in terms of gold/diamonds if you cannot farm it yourself. I chose Juggler at the end of the day because it was the first i got my hands in HD on, could've been the other way round though, was just a matter of what drops earlier to me after i did the calculations.
Currently in use: t10+16 Juggler HD, w/ Runes: Wrath5,Raid6,Hatred X,Wall X
Hope this detailed post helps someone