Which set of armor should I get Gladiators/Dragon's? help please!!!

hi after constant 24/7 farming/trading, i finally come across just enough materials to get the badass looking fissure armor for my warrior. However, I'm stuck between Gladiator's and Dragon's set. Currently, I'm wearing 15k Dragon's set, and I really want the + energy bonus from Gladiator's set. Here are some of my questions that I need help with:
1. Does the extra armor level from Dragon's set really make a different?
2. Does the extra energy boost really make a different?
3. Which set if most suit for PVP? and which for PVE?

by the way, I saw the screenie of new 15k Gladiator's set, looks awsome.(woot shows even more skin P)

Knight boots, glad everything else. Stonefist gauntlets if you use knockdown.

Whole sets suck.

thank you for your replay, but I go by the looks P:
I use sword so not gonna have any knockdown skills.
Just want to know which set as a whole works beter. or I should use gladiator + ashclon helm which gives the extra damage reduction. but I really want the +1 sword/str from helm thou