I have 0 domain knowledge as well, but it's pretty clear that no "comparison" can be made considering that Subsurface is a visualizer of logs from a dive comput

I have 0 domain knowledge as well, but it's pretty clear that no "comparison" can be made considering that Subsurface is a visualizer of logs from a dive computer, and Oceanic+ turns an Apple Watch into a dive computer. I guess it's possible that Subsurface might add support for visualizing logs from Oceanic+.