There's not a lot of difference between the rim brake and the disc brake model.i would guess. My wife and I both had Escape RX 0s with the Topeak rack and bag on them. When I sold them and bought 2 Escape RX composites I moved the rack system over. Then four years ago I sold the RX composites and got a couple of FastRoad CoMax 1's with disc brakes... guess what I moved the rack system to the them as well. The combo is hard to fault. We have over 50K miles on the rack system carrying all sorts of stuff the only fault is the zipper handles on the racks tend to fail in the FL sun after a number of years exposure.
Here' what it looks like on my bike: