For a wizard, Reese is still pretty young....so I feel like a lot of the finesse would come.  So I think her ability to take a punch at this stage is both more important to her growing as a wizard as well as being more realistic for someone her age.  I would like to think Reese is a little more "switched on" than Harry is and thus less apt to go charging into a situation, but most of her combat wizardry to date has been more brute force than anything else...despite her parents efforts to hone her skills.