I think the Centrion looks like a higher quality bike than the Miyata.

I've had a rack on my Colnago long enough that undoubtedly the paint under the P-Clips will look much more pristine than that everywhere else.

You need to find some of these dropout adapters... but apparently they are getting a bit rare????

Blackburn Custom Eyelets for Campagnolo Style Dropouts rack adapter may be CE-01