Well, both of them offer 1x and 2x, but that said, if you are going 2x, Shimano seems to have the lead.
For me: 2x for high paced gravel road riding, especially if you ride or race in groups.1x for more adventure focused riding and for rougher terrain.Clutch derailleur either way.
I have and like the tall humps on the SRAm rival brake hoods, and seems like GRX is doing the same.
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