Ralph Hansell wrote:

From the sounds of it you would do fine with an SPD-type MTB shoe and
pedals for both bikes. If you get into riding with a high testosterone
group ride then go for pair of road shoes and LOOK-type pedals.

Maybe I'll get more into group riding one day, but at the moment I'm looking
at spending quite a lot of time taking it easy because of a (non-cycling)
injury. I'll go with the 520s.

--
Jim