A (long) while back I did a comparison of gearing

Tenere 15/44



Tenere 14/45



Tenere 15/45 (stock)



For what it's worth I ended up going 15/46 as I found the 14 too low for everyday use.

Just finished the 3rd chain and sprocket set in 38k miles which was 15/46 with a Renthal hard anodised alloy rear. Lasted 9k. Chain was Tsubaki O-ring 520, better than OE but not as good as the previous set up which was Supersprox rear with DID VXM chain, lasted 19k miles.
OE chain was the worst for wear.