Originally Posted by FBinNY

Hate to nitpick, but be careful about generalizations.

A number of Taiwan made hubs used a 9.5mm QR rear axle in the past. They might have gone to 10mm by now, but I don't know. Also not all 10mm axles have the same thread. Most are 10x1, but for example, Campagnolo used 10x26 for decades.

As far as the OP is concerned, larger is better, but is isn't a matter of choice. The hub manufacturers specs the axle and replacements must match.