What is the different?

It's the +10 Maximum Lightning Resist that makes them so good. A character's Belt is usually the least important piece of equipment to a build, ergo, TGods is highly useful. Think about it this way:

10K Lightning WITH TGods (not counting the +20 absorb, since there's some debate as to exactly how it works):

10000 / 4 = 2500 (pvp penalty)

2500 * 0.15 = 375

375 is what you would take.


10K Lightning WITHOUT TGods:

10000 / 4 = 2500 (pvp penalty)

2500 * 0.25 = 625

625 is how much damage you would take


Of course, these are both assuming you're running Max lightning resist.
That should be a clear enough example why TGods is good. After the absorb is counted in, you'll be taking even less.

Ahh, that makes a little more sense. I guess I assumed that everyone wanted TGod for the absorb on it. Thanks!

Now, explain where stack resist come in.

Stacked resists are resists OVER your maximum resist, to counter resistance-lowering effects such as: Conviction/Lower Resist/Cold Mastery.

Example of stacked resistance: Your Lightning Resist is at the cap of 75% in normal, but you have 50% in Hell. That would mean your TOTAL Lightning Resist is 150%, but your EFFECTIVE Resist amount is 75%.

Now, if someone use a Lower Resist curse on you, and you lost say... 60 to all resists, you would still be at 75%, since it subtracts from your TOTAL resistance, rather than your effective resistance.

Hope that helped. Feel free to ask about anything specific on that...

so if i have 75 res of cold and light in hell. i woul dhave 75x3=225? i dont have maxed but i have a lil over 75 maybe in hell

What?

If you have slightly over 75 in Hell, whatever that amount OVER you have is referred to as a stacked resistance...

I have NO clue where you got the 225 from.