How secure & scalable r wifi mesh networks(802.11s) & wimax mesh(802.16a)?

Hello everyone ,

I need to know whether wifi mesh networks (802.11s) and WiMax mesh (802.16a) can be compared on the following aspects:

1) security (regarding issues in both, solutions and finally which one is better)
2) architecture ( what are equipments used in both , how scalable the architecture is )
3) capacity and other resources like bandwidth