I just came off a 2016 ZX-10R a week ago, and on to my 2016 R1. My ZX-10 had a Graves 3/4 system and ECU flash, and had the front and rear sag set. All stock otherwise. It was a great bike and I really liked it, particularly the Showa gas charged BFF fork and the smooth engine. So the obvious question, why did I sell it? One word only, ergonomics.. Im 6'2 and 190 pounds and no matter what I tried to do I always felt a little cramped, the pegs were too high and forward, and the clip ons felt way too close.. The riding position didn't allow me to move around as much as I like to on the bike. Its just a bike made for a smaller rider. If it wasn't for this issue I probably would have kept the ZX-10. The R1 feels like a smaller bike but with a much roomier cockpit that allows me to move like I need to.
To compare to the R1, the ZX-10 feels bigger and softer, and takes a bit longer to respond to inputs. It feels setup more for the street than track. The fork is better than the R1 fork and the front end has loads of feel to it, and inspires confidence. You can switch lines mid corner, and brake while leaned over without disturbing the chassis.. Yamaha really needs to switch to these Showa gas charged BFF forks on the R1. The shock on the ZX-10 is about average, nothing special. The Euro 4 emissions regs hit this bike hard, and in stock form it feels gutless and lazy below 7k rpm, but at that point it takes off and by 10k is pulling really hard. Once a full or 3/4 system and ECU flash is done it really wakes up the motor and it will put out 195hp.. The electronics are good as well and inspire you to push it hard, the TC comes on so smoothly that you wouldn't know it was even working if not for the blinking light on the dash. The bike feels like a big bike but not especially heavy, it handles like a smaller bike and the agile, stable and planted front end makes up for the bikes "large size" feeling to an extent. Overall the R1 feels smaller and harder, not as smooth as the Kawasaki but faster, more agile and more exiting to ride.. These are all just my opinions of course, other may feel differently