The Duke is a work of art and superficially has really impressive build quality, unfortunately under the skin it has Italian electrics and build quality which is scary given its huge complexity. Duke is great if it works and the v4 sounds bassy but its a bit peaky and there is so much power up high its hard to get there as fun starts about 9k and runs out about 15k at which point you’re well beyond points on the license and into jail time. MPG and Range is a major issue, I typically get under 60 miles from brimmed to light on and thats moderate road riding. Handling, brakes etc are as near perfect as I can tell. The nineT is totally different, its not worth even fair comparing but I know which I prefer to actually ride, the nineT may be a bit agricultural but thats a lot of its charm in a world of ultra modern, it is “FUN” not just a top trump tech fest bike. The nineT is a keeper, the Duke was an Italian fling for a year.