Torque control handles - Felo and Wiha, interchangeable bits?

[marlinspike]

Does anybody know if the Wiha torque control blades will fit a Felo torque control handle? I'd like to get the Felo handle but give it a 1/4" drive bit (i.e. to use 1/4" drive sockets). Wiha makes the blade, but I prefer the Felo handle (cost/benefit reasons).