I appreciate any input.

I am riding a road bike. I want to use shoes that I can walk in which seems to limit me to mountain bike pedals. I am currently using Shimano XT M780s. This is all I have ever used and I am happy and comfortable. But, I am curious what the distinction/ value of the other brands might be. I am curious if I might prefer the Speedplay Frogs or the Time ATAC 8 or 6, or the Crank Brothers, or the Mavics, etc. I am riding slow, but long rides and comfort is important over speed and therefore weight.

Again, I ask out of curiosity, not need. I could easily continue happily with Shimano.

Thanks.