I have gone from a 749s to a 749r in the last couple of weeks. My first impressions are:
 1. The r turns much much quicker than the s
 2. The difference in speed of revs is incredible
 3. The all round Ohlins makes a huge difference
 
 Got my first trackday on it on Friday (it's now run-in), so I'll let you know how that goes.