I actually did compare a 4ft canare to a 4ft mogami , there was a noticeable difference to my ears. mogami has a somewhat dark tone , a little treble roll off in comparison to Canare..If you are wiringing up a pedal board with several 1ft jumpers and used two different brands I would be able to notice a difference...Some more than others , there are some brands that will sound more similar to eachother, depending on the design.
Personally I would go with Canare , the clarity is very beneficial for pedal boards IMO