steve dont take this the wrong way, but I dont think you are going to see a problem
When I bought my road bike it came with pedals. And now (with the Answers) I have 3 pairs of shoes. It all accumulates up over time.
what road bike are you riding?
I run SPDs on my woods bikes and LOOKs on my road bikes. There's no doubt in my mind that the larger platform/cleat of the LOOKs is an advantage for longer rides, comfort-wise.
My road shoes are quite a bit stiffer and lighter than my mtb shoes, both of which are palpable advantages as well.
YMMV.
Northwaves with carbon soles on the road. Old, heavy Carnacs in the woods. The mtb shoes are nowhere near as stiff as the road shoes and weigh twice as much, I'd bet.See what I mean? Interesting indeed, especially sicne my feet go numb on the road bike after a while. Like heythorpe says, clip in once, then clip out. I did get a break Sunday because some thoughtful drunk driver decided to smash their bottle on the roadside which eventually led me to my first flat of the year. Really, without considerate people like this my feet would complain even more.
What shoes are you using on respective bikes? I got a pair of Specialized BG Comps which I will use on everywhere this year. I'm not cool enough for individual shoes but I may need to revisit that.
..lateral rocking that can occur on an mtb pedal. This can't happen on LOOKs and other road pedals which feature a larger platform.