I have used them both @ 500mg weekly for 6 weeks at different times. If you get genuine product they are the same damn thing. I would go with which one you can get domestic or which one is less expensive.
same product made in different location - both good
jesus christ same shit. But if you compare either of those to the mexican susts, I think the karachis or turks are more potent, but that could be my imagination too.