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The differences are subtle and you still get lots of dive time with these computers! They are just slightly more on the conservative side. Then I add on more conservative practices to add my own margin of security...
M2 is conservative according to ScubaDiving Magazine, I'd go with a newer Mares like a Nemo Wide or go with an Aeris XR-* computer
I'm not sure if the NEMO Wide uses the exact same model - but the display is fantastic - all the information you need/want is always right in front of you.
So far I can say I always run out of air before I run out of NDL time![]()
