The RQiS line is pretty low powered. The RQiS 1 Tour is extremely low powered, but has more heft being that it's close to 12oz. The RQiS 1 Tour XL 95 is lighter, but I found offers more power...both have great access to spin.
The RDiS line is more stable, i found. Especially the mid, which is 12+ oz, but it is much stiffer. The MP is closer to the RQiS in spec, but I found that it played stiffer than its rating would suggest.