differences

what are the main differences between these two Aqualung computers? I am looking to purchase one of these computers from my local dive shop.

Apologies if it has been covered somewhere else, but I couldn't find anything in my searches here or on Google. My question is what exactly are the differences between the older Oasis and the newer Oasis Pro (2016) and do you think it's worth an extra $135 to get the newer model? From my...