The diameter is larger on the R154 side. Doing a little digging I get results from some folks I trust saying that some discs will interchange without issue but no one seems willing to actually bet money on it. So.... I'll amend my initial response to a great big: Maybe.
I remember someone trying it once (I think it was an owner on SF) and having significant rubbing/scraping problems with a performance clutch disc spec'd for a GTE in a GE clutch. Not the prettiest thing to find when you have to pull the transmission a second time I'm sure; But he was pushing his luck, it was a several millimeters larger in diameter and there was some other issue with the pad overreaching the flywheel's friction surface (might have been an aftermarket flywheel). I'm sorry, I just can't remember all the specifics; I just decided that it was one of those things not worth screwing with.
I'd just contact the manufacturer and get dimensions and compare them to the dimensions of the OEM GE disc. If the diameter is just a few more millimeters then I wouldn't sweat it.
What are you running that you current clutch is slipping? Unless it's old or damaged the GE doesn't put down anywhere near enough power to win that fight... not even with every mod you can throw at it. The stocker will hold more than the transmission is capable of, I've been there done that.