I bought a 721 new in 2012, I loved that boat.

In 2018 I was back in the market for another new bird I looked into both the redesign 721 "it was made wider then prior model years" on front deck, but not quite as wide as the 921. I do fish a lot of big water, mostly great lakes, so as ruff as it get's. I do have to say you can tell the difference in ride however the 721 is still very good in huge water. I ended up putting all the 9 series upgrades including 9 series wires into a 2018 721. I felt I was willing to give up some comfort to have a faster boat that was better on fuel and more agile. To me the 921 just felt like it would do big water good, but if I had to work in tight spots like between docks it felt like a barge. I guess what i'm saying is I admit I gave up comfort for performance and fishability.