Compared to the Lift 170HA the Prog170:
-Turns/rolls much better (quicker rail to rail)
-Glides much much farther
-Pumps much better/smoother and easier
-Similar low end
-Better top-end
-Less forward pitching during turns
-Feels better/slicker through the water
See if you can demo one, then you will not have any questions. The lift was good 3 years ago or whenever it came out but you’re just comparing it to the latest and greatest in a fast evolving field.