Originally Posted by
WruntJunior
Juggernaut loses spell damage for the most part, but gains higher melee damage (from buffs) and ranged damage from manyshot. With EDs, this gives favor to Juggernaut, especially in EE content where running out of spellpoints is a realistic concern for maintaining spell damage.
Juggernaut has very similar survivability, due to at least as easy access to saves (if you play the paladin version, even easier, though your DPS suffers slightly) and generally more HP, along with typically having more PRR - Reconstruct and Heal are really in about the same category for instant self-heal, so being able to take more hits makes up for not having wings to avoid a few hits, while also gaining damage from not winging away (which causes reduced melee damage).
Trust me, this comes from playing the same character with a roughly equivalent level of well-geared as both a Juggernaut and a melee FvS (as well as a Paladin, but that's a different kettle entirely - it gains more in survivability while being only at best a little better melee damage than the Juggernaut).