Throw is better on the Eagletac G25C2, but you can buy the turbo head for the ThruniteScorpion which will make it the better thrower.
The regulation with single 18650 cell is better in the Eagletac, but you have to set it to not step down.
The Thrunite quality is a little better and feels solid. It requires less maintenance.
The Eagletac is a little brighter, based upon the U2 version.
Function is personal preference.