Sensible replies so far.
The other thing to consider is that touring bikes come in many types. There are light tourers that will handle modest loads, and expedition tourers that will go anywhere with you and 60lbs of gear. The former, equipped with light wheels and skinny tyres, will rival the performance of a decent road bike. The latter, not so much.
Years ago I used to commute 16 miles to work. When I took the 26lb touring bike plus a pannier containing a laptop and clothes, the outward journey took me around 65 minutes. When I took the 18lb road bike, unencumbered, it took about five minutes less. Had it been hilly and/or traffic free, the difference would have been greater. Only you can decide whether that is significant to you.