95w vs 125w is a function of the speed and voltage each chip comes from the factory with.
Once you start overclcocking, all bets are off and those two numbers mean nothing.
If you had two X6 chips that ran at the same speed and one was rated at a lower wattage than the other, the lower wattage chip could be "better binned" than the higher wattage chip. (Meaning it may require less voltage to stabilize at the factory clock)
But don't read too much into it. All chips are different. I was able to undervolt my 1045t by a pretty big margin up to 3.4 GHz. But then it hit a wall. Getting to 3.5 took a big voltage boost to the point it wasn't worth it.
Some other X6 chips may not be able to undervolt the way my 1045t did up to 3.4Ghz, but...