1. BFR is a tricky one, but it gives Superman the opportunity to end this before it begins. It's not a sure thing though, because the Hulk is fast enough to react, and possibly latch on to Superman before he attempts to toss the Hulk out into space. I'd give Superman an 80% chance of taking this with BFR on.
2. WW Hulk was the most dangerous version of the Hulk ever. Judging by his weight and height, he walked around with high Herald strength, durability, healing. His speed was greater than any other Hulk, as was his energy projection. Could he win? Sure if he went for broke and nailed Superman the way that he nailed the Sentry when he flew in. In order for the Hulk to win, he would have to continue hammering Superman once he hit him for the first time. If not, Superman could turn the tables, and relentlessly hammer the Hulk into a KO'd state.
When debating Hulk vs Superman, people have to realize that both of these characters are as tough, and strong as the story requires them to be. They both have the strength to dead-lift Jupiter, so who can really tell.