Personally I've had a 7.3 and never had any problems. I like how the 7.3 is more versatile though with the front braze-on's for if you wanted to go more adventurous on the bike. Looking online they have the same tires it looks like. I know mine a couple years ago came with slicks, but they were very hard long wearing tires that didn't offer very good grip, especially in the wet. Ride both, see if you notice a difference then decide if it is worth it. Another factor to consider is if you are storing it outside and would you want to let it sit outside if it had visible carbon fiber, as that could attract thieves. Tires can be changed out easily and for 10-20 miles the 7.3 would give you money to get a more comfortable saddle if you wanted as well.

When buying mine I only looked at the 7.2 and 7.3 though. You may check out the hybrid section as I'm sure they've discussed it more.