I have the bh77 and for its size I am pretty happy with it. I purchased a ripper tooth that cmes in handy at times. In the past I had a scut Massey with BH and a kubota b2920 with a bh65. One reason I traded for the bh77 was full 180 bucket rotation and 180 swing with dual swing cylinders, besides a more power.
I do think the new woods BH75 is closer to the kubota BH77 as far as listed specs, so the 80x is stronger.
If you would happen to get the bh77 I would suggest the 16" bucket vs the 12" for much less clay and soil sticking in bucket. The 12" bucket on the kubota held sticky soil more than the Massey 12" for example due to a little different profile.
I would have no concern going with the woods BH. Sure, hydraulic thumb would be nicer than the mechanical thumb I have, so another detail for you to decide! I saw one on tractor house at a good price, but I don't know what price difference you will find between the two.