First I took out the 650. I was surprised at how smooth it was. You can hardly feel the engine running and when you accelerate it's electric smooth which is surprising for a V twin. It packs a good punch and can accelerate hard if you push it. Both bikes are very similar since they basically have the same frame and running gear, just different engines and a few little other things. They're easy to ride. The first thing I noticed is that the bike seemed really big. The fairing sticks out in front of the bike and makes it feel big. Once you get used to that though it doesn't operate awkwardly. The clutch pull on both bikes was considerably greater than on my bike which was disappointing. I felt that it was a bit too hard. Brakes were good. After I took out the 1000 I felt more at home though. It has fantastic power, the gearing is better sorted it's roomier and I felt more relaxed riding it. I was constantly stirring the gearbox on the 650 where I didn't have to on the 1000. I hit the rev limiter 4 or 5 times during the test ride on the 650. Didn't even come close on the 1000. The bigger bike is 10% heavier but 33% more powerful. I didn't notice the weight but I certainly noticed the power. The 1000 was a bit rougher below 3000 rpm but nothing to complain about. I'm really glad I had a chance to ride them both back to back. I've read so many glowing articles about the 650 I half expected to like it better. For me though the 1000 has the right mix of power and gearing. Unfortunately it's also more expensive. The 650 almost seemed too sanitary, too smooth. It was less interesting to me but may be a better bike for around town. It's important that I get a bike that will satisfy me for a long time. The 650 wouldn't do that.