I have the gt 5 pro and was looking at the ultimate 2. Issue for me is that its only worth it if you are doing deep sea diving or willing to pay that much extra for the incredible looks.
Downsides is the 2-3 day battery life vs 7-10 day for gt 5 pro or 12-15 day with gt 6 pro.
But having moved from Samsung watch to Huawei, the freedom of not charging daily and not worrying about battery life is amazing and I wouldnt really give it up to go to the ultimate 2 (even though its still over double apple and samsung).
So this reply is quite a while after you posted - did you get the watch?