which would be better?

[Patrick]

What? I'm not saying the 1950 is better, I don't really know much about either of them. The 60a and 100a thing doesn't say which is better. If they are both rated at 3000w then that means they can both put out the same amount of maximum power. I'd be surprised if you could pull 3000w burst in a truggy off-road. Even if your batteries have enough power, you'd probably brake traction or flip over backwards before you get 3000w.
Do you understand what I said in my first post?