for those that have never seen oceanic, or the two side by side, find one if you can.
if you will have the trim exposed there is simply no contest, unless you dont care for aesthetics.
its like a euroreef and asm skimmer. both perform well, but the euro reef is so much nicer to look at and made with better materials. the things is, that there is no need to stare at a skimmer, unless you have that fetish.
but the looks of a fish tank plays a major role, as you HAVE to look at it. it is in between you and your reef.
as far as size goes, most of the smaller tanks will be about the same thickness, but with the larger sizes you will start to see a difference. but, other than the "wow that glass is thick" feel, not sure what it does for the long term integrity of the tank, ala euroreef.
but in the end, it is by far much nicer to look at and i agree is easily worth the extra price of a bucket of salt
but dont take it from me or others, go take a look for yourself.
nemo g