would you say one works better then the other or would you get the same results with the only difference being sus stays in your system longer?
I've never used Omnadren, there is no advantage of using it over Sustanon.
People report more bloat and estrogen related sides with Omnadren due to the faster acting last ester, that's why it's probably not as ideal as Sustanon.
Both are for base Test cycles, in stacks, though I would prefer the smoother more even Sustanon over the Omnadren.
I believe Omnadrens are cheaper in Europe so that's why so many people use them.