[quote name='MSUHitman']There is another new armor set in this DLC and it's the new most powerful armor suit (if you get it post-game at least.) They were lazy though as it looks EXACTLY the same as the armor set you find in Act 1 of the game, just a LOT more powerful.[/QUOTE]
Although your post MSUHitman is rather old now, I have to intervene

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Actually in max level for each (level 26 for Regalia of Weisshaupt and level 30 for Orlesian Lancer), I have mixed feelings. I think each are for a particular type of character. We will take a look to all the stats of the Regalia of Weisshaupt and the Orlesian Lancer with all pieces and with set bonus:
Regalia of Weisshaupt:
819 armor
+1 cunning
+9% damage resistance
+6 fortitude
+6 strength
+7% healing to this character
+39 health
+60 defense
+10% physical damage
Immunity to flanking
2 rune slots
Orlesian Lancer:
861 armor
+357 attack
+10% attack speed
+115% healing to this character
+50 health regeneration rate
+10% damage resistance
4 rune slots
The Regalia of Weisshaupt seems to be more interesting for a tank (one-handed weapon+shield), since it has a lot of defensive stats:
- damage resistance
- cunning (increases defense)
- fortitude (resistance against the effects of knockdown)
- strength (increases fortitude)
- healing to this character
- health
- defense (ability to deflect, dodge or parry incoming attacks)
- immunity to flanking (if someone is located in within 120 degrees, 180 for rogues, of your back, he receives a flanking bonus - for example a full flanking bonus of +15 to attack negates the equivalent of 15 attribute points of your dexterity, 5 full levels)
Take a look to the Orlesian Lancer. It has two high level attack stats:
- attack (chance of successfully hitting an enemy with a basic attack)
- attack speed
For the rest, only "damage resistance" is good for a tank but not sufficient, "healing to this character" is pretty useless since most of healing spells give you almost all your HP and the goal for a tank is not to be healed, but to avoid taking damage. "Health regeneration rate" sounds good but the Orlesian Lancer set doesn't have enough defensive stats to really used it to its full potential, putting this stat just as a nice secondary bonus.
So I think that, if you are a tank, the Regalia of Weisshaupt set sounds better but if you are a DPS, the Orlesian Lancer is more interesting for you =).