...But dkbit98 mentioned something interesting. OneKey had a serious vulnerability a few months ago where it was proven that the keys from its secure element weren't encrypted and thus could be intercepted. That's exactly what a security company did and made OneKey aware of that. Despite the existence of a SE chip, it didn't make the wallet safer because it was coded wrongly. Who knows what else they did wrong that is yet to be discovered.
Compared to OneKey, DKBit98 may prefer Keystone, perhaps because Keystone is air-gapped.
However, in terms of user base, OneKey (with 50k downloads on Google Play) is significantly larger than Keystone (with 5k downloads).