It is a topic that has been fully discussed already. I'd said, that there is no a definitive answer on which one is crisper, bumper, nor anything else; however, there are differences, but how dramatic they are will depend on your own sensibility.
I have two boards in use now, one with ergo-clears and the other with round 1 Zealios. I prefer the ergo-clears my self, they feel, to me at least, a bit firmer and the bump is very noticeable, while the Zealios' are a bit softer and the bump is almost imperceptible.
You should try them for yourself, that is the only definitive way to get your own personal assessment.