Can't speak to the Oceanic, as I'm a Suunto honk.
The good for Suunto Vytec: Reliable, rugged, easy to use, intuitive (read: narc friendly), gas switchable, lots of memory, can be downloaded to PC, the
Tobin Boot, user replacable batt, transmitter never loses synch, blah blah... it just friggen works!
The bad for the Suunto: it accrues deco at the same rate as the Aeris (presumably the same rate as the Oceanic) but it DOES NOT CREDIT you any time until you get to 15 feet... so even as you ascent during your very reasonable profile, you will not be credited for your good dive plan. You still accrue deco time (meaning you run out of NDL time) until you hit 15 feet. This is the feature I like least about my Vytec.
So if your buddy is diving something else (say Aeris) you both accrue deco at the same rate until you start to ascent - then your buddy begins to credit NDL time while me with the Suunto shows a 12 minute deco obligation at 20 feet, while buddy shows a 40 minute NDL (or whatever...) GRRRRRRRRRRRRRRRrrrrrrrrrrrrrrrrrr.....
All else is a go. Hundreds and hundreds of tough, SoCal cold water dives and never an in water failure. I love it.
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Ken