Assuming that all of your road shoes fit well and are stiff enough, I don't think pedal choice would affect foot numbness. However, cleat position might. I just fixed a slight numbness issue in my right foot by moving my SPD-SL cleat slightly (~1.5 mm) forward toward the front of my shoe. Mid-foot pedaling is now all the rage, but I find that if the pedal spindle is too far back (relative to the length of my foot), my ankle does not bend as much during the pedal stroke, which leads to foot numbness.
Caveats:
1. I have only ridden clipless (SPD-SL) for 14 months, so I am a relative noob who may not know what the heck I am talking about.
2. I have very flat feet so the above may not apply to anyone else.
Last edited by SoSmellyAir; 02-22-24 at 10:07 PM.