I've only used spiderwire classic braid and fusion. I like them both. I'm happy to see improvements, but those newer variations you mention weren't available last time I bought for fishing. I just picked up a few reels of sufix braid a few months ago, but have to admit that I didn't even look over at the spiderwire to see if there were newer products.

Even sight unseen, I'd trust that these new things are plenty tough, just be careful about fraying and sunlight. If your use requires the full strength of the line, be sure to tie around frayed sections as soon as you notice the damage.

Just did some quick reading and it looks like the spiderwire ultracast has a tougher and more tightly woven mantle than the classic braid. That sounds like a real improvement to me, but I'd recommend only buying one spool and practicing tying knots in it and using it for some real world tasks before you invest