Its actually fact, but I know what you're talking about
Many believe the 9800m GT is the 8800m GTX with a new name because they are so similar.
The key that separates the two is the 9800m GT supports hybrid SLI. what’s unfortunate is the m15x still uses binary GFX vs. hybrid sli even with the 9800m GT
ref:8800m GTX9800m GT