Most commuting, you often have to use your brakes which wastes all that energy put into accelerating the extra mass. It adds up. Which is why I coast to stops, lazy cyclist that I am.

I started out commuting on a touring geometry bike, then a little on mountain bikes and finally conventional road bikes. I miss the touring bike some times, the longer wheel base and rack and fender capabilities. OP at least try some of them out; objectively you get the best of the cyclocross bike for commuting purposes and better in other ways.