darkSpyro

I want to level up my Nitro Freeze Blade (lvl 1) against Magna Charge (lvl 20) in the competition arenas.
I´ve noticed the following, I always used the two above mentioned Skylanders (the damage values ******are correct, gold and EP are approximate values******)

PS4, Portal Master Rank 16, Gold 62, EP 352, dmg (square) 23
PS3 Portal Master Rank 60, Gold 332, EP 2252 dmg (square) 21
PS3 Portal Master Rank 1 (new game), Gold 62, EP 350, dmg (square) 28!

How do the different values ******can be explained?
Gold and EP would hang together with the portal master rank, being not clear to me is what plays a role.
The damage, however, is entirely a mystery to me especially because Freeze Blade does 30 dmg against the dumies in Woodburrow.

Any ideas?