Sugino RD Messengers, not 100% round?

I recently bought some Condor-branded Miche ones for £100. They come in black and silver. I can't find any tight spots. They also take 144mm BCD chainrings which is the track standard, unlike the other Miche cranks which I believe are 130mm. I think 130mm BCD is Campagnolo and would limit the choice of replacement rings.

I really like the Sugino 75's but couldn't justify it for a bike that's going to be left locked up.

miche old 135 bcd
miche new 144
sugino messenger 130 bcd

shimano road 130bcd
campag road 135bcd

just for the record