Hi Kaivalagi, dunno if we're talking about the same bike. This Z1000 is new this year and is the Z1000SX with shorter final drive gearing and minus the fairing. And it's a feckin' beast with awesome handing, flicks about like a 400, great brakes, fully adjustable suspension. It's got a weird 'angry insect' type look with a funky LED headlight thingy. Looks cool, bit weird but cool. I liked this a lot.
I am looking around at the moment and have ridden three Street Triples, R and std, and they're great. This felt very similar ergonomically and railed around corners in similar fashion to the STR coupled with great stoppers. I liked it more than the STR for the huge torque and power building from 2.5k all the way up. The STR seemed to lag on acceleration from lower down the revs (I put this down to not being used to the bike), this beast just leaped forward with urgency. Was giggling like a little girl in my helmet
The STR has better suspension in my opinion and it felt smoother on very similar ground. The STR is also cheaper so is still the current fave.