Radware vs Arbor

Doing a bunch of research, and I can't find a meaningful comparison of these two products. Work for a carrier, and I am looking at implementing a DDoS mitigation service that we can sell to our customers. Radware is cheaper, but I am seeing a lot of noise in various forums that makes me question their viability for what we need. Arbor has most of the market, and I assume there is good reason for it. Both companies seem to be very deceptive about how they compare to the other. Anyone out there with good hands on experience that can compare? Not interested in input from either company, we get plenty of that already. Good experience, or links to good write ups would be excellent... Davis B.