Personally I buy for the higher end use, not the every day, for you to decide which falls into which. I remember my tours well, I only have a hazy sense of excitement as regards years of commuting. I did a lot of commuting on an MTB, it was not a good choice for the task, but I never lost any sleep over it. I have detailed memories of the offroad touring I did on that bike.

So while just about anything will work, for touring I would bias towards the touring bike. If Surly knows what it is doing in a cross bike, I am not sure why that would be a good choice for touring, unless you run uphill with the bike on your shoulder a lot. Always possible they don't know what they are doing.