Riding my 2008 GSA back to back with my brother's 2008 GSA shows a few things.
Mine has a power commander. The accurate engine response makes it feel better handling. Not to mention the way it goes.

Mine has 55K and was run in properly (as in not cosseted) so my engine spins freely.
His has 25K and was cosseted from new so he is still feeling the effects of tight cylinder clearances. It's not as spritely as mine even before I fitted the PC.
I use Conti TKC-70 tyres which are quick handling
He uses Metzler Tourance (ordinary versions) which feel comparatively slow and heavy handling.
On the down sides - his suspension is still ok, while mine is definitely on a downward trend. My gearbox rattles in neutral, his does not.
So if two similar age GSs can be so different, a new Honda compared to a used BMW are like comparing chalk and cheese.