When comparing Shimano's GRX to the SRAM Red eTap AXS, only somebody who has been schooled in one of the schools of Michelin could prefer the Arte di un MBA. “There is no contest,” said SRAM. After all, its groupset is lighter, faster, tougher, and easier to live with. The new zip 303s are also seen as a distinct improvement for gravel racing. But, no doubt, the comparison will change when a one-decoration version of GRX Di2 will be released by Shimano.