They are such different riding styles, you would want to be used to riding both to really make a comparison and have the sports bike set up for roads, not tracks (which most are set up for).
Any sportsbike over 750cc properly set up should beat the fazer on normal roads, but most I have embarrassed were not, they thought they were, but they were not.
I once swapped my 600 with a friend who had a gixxer 750 K5, after 20 miles I stopped and asked him why he had it set so hard, he thought it was fine. After 20 minutes adjusting everything back to the soft side of standard, it was a totally different machine and handled on the roads, then we had fun, still beat him though with the 600
and again when we swapped bikes
I had a fellow on a S1000RR (not Downey) follow me a few years ago around the West Cork Coast roads and when I stopped at a junction he says to me "I never thought those Fazer 1000s were that good". His face dropped to his boots when I told him it was the 600. Then his 2 friends arrived on a R1 and Gixxer 1000. He says to them "It's a foccing 600, we have been trying to stay with a foccing 600".
We pulled over at the petrol station and started chatting about handling and things. They had the bikes set up for track days (which they did a lot of). To hard for normal west Cork roads and they could not hold tight lines without dropping off the power. I suggested they take a not of their track day settings and take the setting back to standard and have 20 to 30mm sag at the front and 10 to 20 mm sag at the rear for road use. Unfortunately I never met them since to see how the got on.