With same hp you can handle the load one of two ways, width of cutter or speed of cutting. I much rather use wider cut at slower speed. Reasons are slow speed is easier ride. Slow speed is easier on equipment also, less jarring operator or equipment is good. Less waste in over lapping. (One big reason wider mower is more efficient.) Also at lower speed often I get better cut giving little bit more time for grass you driver over to raise back up for cutting it. In your picture don't see issue with lower weight rough cut mower. I have cut that heavy with my Bushog brand rear finishing mower, just took it slow.