We've got the same rack, two full sus bikes with weird cross bars meant I didn't really consider any of the hang on ones.
Also thought I must be missing something because of the price difference as all there really seemed to be was the tipping mechanism and a slightly higher weight allowance but I asked at a Thule dealer and they confirmed that was the only difference.
Really pleased with ours, I was a bit concerned at first that I might not be able to fit it alone but that's actually no problem. Tipping mechanism isn't very advanced but it works.