Originally Posted by
StanSeven
Even then you don't get that full power transfer from the larger platform
+1 I use both, with SPDs on the commuter and SPD-SLs on the road bike. The SLs feel like they do a much better job transferring power to the pedal and the larger platform just feels more stable. The float is also smoother, since the connection isn't metal-on-metal. Clipping in is a bit less forgiving and walking is not as easy though, which is why I haven't put SLs on my commuter.