All things being equal, the fork might be 20mm longer, however when sagged (and allowing for the fork rake) it is probably only 10-12mm longer.
This is about 0.6-0.7 degree slacker, a noticable but not huge increase in stability.
If you want the same weight on the front as the shorter fork, you could remove some stem spacers, flip the stem itself or use a flatter bar.
The BB will rise about 40% of the height, which under normal riding would be roughly 0.2" or 5mm. This might be noticable for you? As the mojo has a lowish BB this would still place the BB height withing a very common range.