OK so I got out and threw the H4. I have a 174g. It's super flat.
First thing I noticed, it's more stable than I thought. I did get some turn on it, but slightly, mostly held straight then cut hyzered. I cuts a hard hyzer at the end, but it just sits and dies. The 750 isn't good for the winter, but not terrible. It is not a flippy disc by any means. More like a wider/flatter F3. I hate to say that I was disappointed, but it was not at all what I expected it to be. I hope an H5 comes out, because that's likely what I was looking for. BUT, It's unique and its fairly controlled with moderate distance and little squirrely movement.
We'll see how it breaks in over time, especially with the weather. So far I rate it something like 9 4 -1 3 ....thats just how it felt to me. this time.