Deniska, you could be right. You put more effort into comparing them than I did! Although I don't have time to confirm that this happened on these particular tracks, I have seen errors in reading jumps while handling the board on shore. In this session I came in to switch from a 9m kite to a 13m. Could also be because I mounted the Trace and Woo wrong?
Regardless, I like the Xensr software the best so I'm sticking with that as my choice, and for the other reasons I mentioned in the video. We do sell both Xensr and Woo, and have the opportunity to sell Trace as well. The Trace offers the best margins for the dealer so if I just wanted to make money, that would influence my decision.
Since no device, these included, will ever be perfect at recording jump height (that will take some laser/sonar/radar measuring thing that is not cost practical), the question for me is that will one device be reasonably accurate and very consistent? In other words, is it within a reasonable margin of error in height, but always within that margin from one jump to the next? If so, then I'm good with it.