I'm not sure which comments to answer first: The ones that say WePay is nothing like PayPal and the comparison is misleading, or the ones that say WePay is just a feature of PayPal and therefore undifferentiated.
We'll just keep building the product and let people decide for themselves.
I believe WePay provides something that Paypal doesn't (or atleast not easily ) i.e. ability to split payments between multiple users/collectors using multiple accounts. Paypal X/adaptive can possibly provide some of this functionality but WePay does it better and signup is much easier is my guess.
In time WePay may evolve to be revolutionary. Remember once upon a time all paypal was a peer-2-peer money transfer service.
PayPal was revolutionary, but WePay seems something that PayPal already provides.
Borland (with their IDEs and Quattro) taking on Microsoft is akin to a little-guy taking on a 800lb gorilla.
I fail to see the parallel here.