Hoe Valley is new and on what looks from driving past to be a great site. Their first Year 11s did GCSEs in the summer so of course hard to tell because of cancelled exams. There's no 6th Form yet though I think there will be in a few years.
Woking High has a pretty good reputation - 11-16 and a normal good school - ie not a school to avoid but not the absolute top school in the county.
Don’t know about Woking High but have friends with children at Hoe Valley who are very happy with it. Both schools are over subscribed so where you live will likely dictate the school you are allocated and if you are looking for in year entry then you may not get either of them - might be worth checking for the year groups you are interested in