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On cavedives the computers show differences, especially in the TTS at the last stop, but if you are arrived on the last stop the differences are small. Have seen this a couple of times on dives over 2 hours in caves with some toothprofiles. But yes, you can see both computers are usable and safe.Well from my testing the Shearwater and HW give same profiles (with very small differences) if set both same. But you need to know HW has some more settings (some special ones) so lot of times the differences are from the mentioned special HW settings.
I think B.R.W. an T.R.O'Larry wanted to answer some questions and explain some misconceptions they noticed…
I do receive material from different surces, one of them is BRW, and think it is good to post on forums to get information available to other readers too…