Yamaha is Synthetic, Motul is mineral. Hence colour difference.
The Yamaha will feel slipperier as it has friction modifiers.
Either one will do for the C14.
Actually both are mineral based lubes.. neither are synthetic, and as noted, Mineral based oils are generally always darker.. But the Yamaha does have friction modifiers, which in my opinion is a better oils than ones without, when used in a gearcase like ours. Both meet the "GL rating", I trust Yamaha oils and have for over 45 years, always have found them to be at the top tier of motorcycle manufacturers "branded" oils, and the people they contract for the refining always seem to be reliable.
Even tho the Motul is dark, and stinky, it's also a fine product; but after seeing the clear stuff, I think I'll use it on my next change, simply because it's clear, and I can get a better idea of the discoloration when it gets drained.. makes a lot of sense.. I still have some leftover Mobil Synth, from my last change last summer, it's pretty clear, with a slight golden color, but I like that clear stuff... and odor free.. can't beat that... I've always said since I began to drive, and blow transmissions and rear ends up... "the worst smell in the world, is gear lube... because when you smell it.. it smells like $$$$$$$ is gonna be needed to fix sumpin'..."