I've tried both of those. As to Palio Macro Era, I don't like it. It's heavy and doesn't feel quite "right" to me. Of course, that's a matter of person opinion. Instead, I use Palio Macro Pro. It's not as heavy, and plays similarly. Era is more grippy, but that dies off. I feel like Pro has a more satisfying Tensor Pop to it. Just a side note: if it sounds like you'd prefer Era over Pro, try Palio Blitz instead. Blitz has a nice pop to it and is spinnier than pro. Feels better than Era IMO. Also, Pro and Era both don't have very good play life. Pro only plays well for like 2 to 3 months depending on how much you play. Era kind of dies twice on you... it drops in performance twice over a slightly longer time period, like maybe 2-4 months. Dunno bout Blitz, I'd imagine it's similar... or slightly better.
Just slapped on my sheet of Thor's. Thor's feels kinda like Jello... the sponge may be hard, but the top sheet feels kinda soft. Very spinny. Very different from the Macro rubbers. I'll get back to this thread when I have a chance to hit with it some more. I've heard Thor's lasts "forever" though.