They’re about the same, with one big difference: zigbee repeats for zigbee, zwave repeats for zwave. But battery operated devices don’t repeat at all. So it depends in large part on what other devices you’ll have.
If you plan on having a roomful of battery-operated zigbee sensors, a zigbee wall switch could go a long way towards making everything else work better.
If you plan to have almost all zwave devices, zwave wall switches make more sense.