You cannot tell how a motorcycle is going to handle from looking at spec sheet, it's lot more than the sum of simple things like front wheel diameter or perceived tire "footprint".I read ya. It's totally pathetic.
How can heavier 19" wheels with larger rotational mass out-handle smaller and lighter wheels is preposterous. This is banter for the uninformed. Then there's the smaller rear tire footprint.
Unbelievable marketing gullibility!
With equivalent tires it's entirely plausible that the new bike handles as well or better than it's predecessors.
And to address some other people, yes, for most the lack of super sticky tires won't make a difference. But there are people, mostly ex-racers, who can and do exploit that extra grip on the street. For them the 19" front wheel is a limitation.