Ok, here's the issue. I live in an area with many hills. So for me, climbing is more of an issue than speed. The Vado 4.0 has a 40t front chainring vs the 5.0 which has a 48t front chainring. Both the 4.0 and the 5.0 have a max low rear cassette of 42t. So based on the math, the 4.0 will be the better hill climber(40t x 42t) vs (48t x 42t). However, the 5.0 is rated at 90 NM vs the 4.0 at 75 NM. Will the difference in NM be significant enough to make the 5.0 almost equal or even better in hill climbing ability than the lower gear ratio of the 4.0? Thanks.