Just did a similar route, 1hr 45 min ride, on two of my bikes, boardman 29er with mid drive and an old scott genius MC40 hub drive with 26" wheels. When I came back, I noticed I was a lot more "achey" after the (much newer) boardman ride, with arms , shoulders and back aching a bit. When I came back after riding the scott, I felt great. Maybe partly due to full suss (although these rides were on roads) but also the wheelbase is significantly shorter. Is there some explanation ?