I have an H2 and used to own a gen 1 ZX10. I have ridden all gens of ZX10 including the '16 model. I shaved about 35 lbs off it with muffler changes and fender eliminator, and reflashed the ecu - that's all and it has 231Hp at the rear wheel! Its hard to get your head around the intense experience of this bike even on a simple commute to work, its a great way to start the day. It handles extremely well, of course it is heavier than a ZX10 but its comfortable, nimble enough and has acceleration that you will never experience with any other production bike. If you check out the H2 forum, there not a single unhappy customer, just beaming smiles everywhere. The bike is so well built and strong. I would say that maintenance is probably better than the ZX10 because things are much more accessible to get at. Service intervals are the same. Only extra thing is to check the supercharger shaft end float which is easy anyway.
If the magazine tests don't convince you, take it from a very satisfied owner.