It looks like Peterson knocked off the TL design. They use the same dual over/under LED design but instead of using smooth longitudinal strip reflectors they used blocks. The edges of the reflectors create artifacts in the light pattern, so without even seeing the Peterson's in action, I would say the TLs are will provide more uniform lighting. One of the TL's few drawbacks are the artifacts they create (X,Y patterns) and they are very likely worse on the Petersons. It probably comes down to manufacturing cost and it is cheaper to build the block based reflector.
In any case, they are both about the same price and the TLs get great reviews, only second to the JWs, so I would say the TLs is a better choice.