They are both Krytacs...internally they are the same.
As for upgrades...do nothing. You should not upgrade anything until you play with it a lot, like at least 10 times. Then you will know what you may need to upgrade. Making changes before you actually use an item is not smart...especially on the wallet.
As for upgrades...do nothing. You should not upgrade anything until you play with it a lot, like at least 10 times. Then you will know what you may need to upgrade. Making changes before you actually use an item is not smart...especially on the wallet.