Different BCDs means it's on rear cog only. The 49 front chain ring is on the Harry Quinn which is more comfortable but the better gearing is on the Mercian but as its a bit big not quite a good fit.
Choices are better gearing or more comfortable ride. Currently leaning toward to ride
Looking forward to this and will be flying the lfgss colours too .
Aiming for a half nine ish arrival so will just keep an eye out for tops and or caps.
Just a thought on gearing, one bike is 49/17 and the other 47/16, not much in it but due to not liking hills will be going more spinny.