I have not tried the FD XL blades but did a comparison that I posted between the FD Polar, Pegas Modified Geometry an d PS Woods Super Sharps. I also did a test where I tested how far I could cut in 30 seconds in 1-1/4" thick red oak. The Super Sharps were the best cutting blade. I originally posted the exact results but someone said it was not an important test so I deleted it.
Even though the modified geometry blades have some reverse teeth, they still cut well in my testing and better than the FD Polar blades.
While the Super Sharps are significantly more expensive, they really cut well. When I get a chance, I will have to try the FD XL blades.
I appreciate people posting these blade comparison. While everyone has a different machine and cuts differently, it is still good to have a good discussion about the differences.