I just ordered the Ortlieb Sport-Roller Classic. However, I now realize the Gravel Pack has nearly identical dimensions and capacity, but is lighter. The Sport weighs 65g per pair, while the Gravel is just 40g per pair. And the Gravel has a second bottom hook for better retention on your rack.

Does anybody have experience with both? I'm sure they're both great, but I like the idea of shaving 25g. What would I be sacrificing? Durability? Anything else?