for the most part, no. But O-E is a very good powder, second by just a bit to Swiss in power and consistency. It IS a better powder than Goex, But Goex is a very good powder too. Fine for hunting or target. For most Typical situations, Goex is great. (I use a lot of it) Its mostly the match and competition guys who shoot a lot of OE, and Swiss.
I believe it's made by Goex, their top of the line powder to compete with Swiss. It's hotter that Goex.
It leaves a greasier residue compare to Swiss (actually everything does -ha). The cartridge guys love it. For me, I found it does not shoot as well (accurate) as Swiss.
I wish I could find some Swiss locally. Cabelas is opening up in a few months here in town so might be able to score some there. Best I am going to do for now is Olde Eynsford or regular Goex.