Optimal sprocket option

[Raux]

At 14/42, you're at 3.00:1.

At the same ratio, a 15/45 would treat your chain a bit nicer.
It's not a night/day thing, it just changes everything a little bit towards a longer-lasting drivetrain.

Ideally, a 15/44 or 15/46 would get you away from the 'even' ratio.
Sometimes the 'even' ratios produce vibrations and harmonics that are annoying.

interestingly this is the stock (15/45) gearing for the 696