As daily rider commuter over past 4 years, i dont have a car, the Sidi shoe once sized correctly do fit like no other out of box hands down. Supple upper with perfect padding in toungue and variable pressure upon dorsal foot by closure system that is adjustable on fly. Color options are fun and can be motivating when you have to dress daily gor the emride regardless of weather.
I have protective tain covers i use when appropriate.
Ive had these shoes sopping wet from rainstorns and once dry are back in tip top form.
The MTB shoe is heavier, especially noted after 40 miles or so and can be a bit hotter in summer, agree with comments by EMW.
But considering superior fit of SIDi may be worth it for you dependent upon your individual use..