As above, there's nothing between those two mechanically, it's all about how they feel to you.
The guts of both rifles are the same, it's just that the Prosport has been re engineered to allow the cocking lever to live in the stock instead of under the barrel. This does change the way they handle and feel but little else.
You'll be fine however you go and as has already been mentioned, HW do some pretty handy under levers too.