Yes, Defense teams have a 20% bonus to attack and defense stats that’s separate from intrinsic base stats and Troops.
As DoT scales with the attack stat, it’s normal that a DoT dealer on Defense has a higher DoT amount than the exact same hero on Offense would, even with the same Troop — and that it would be exactly 20% higher.
adding in additional info from our conversation in Beta about this
Yes, exactly, which has caused a lot of confusion for many people.
You can find mention of this in several other places, e.g.
Plus topics like these: