Yeah, the Great Heep got a little bit more than the rest, as well as more color adjustments to look more like the rest of the NTSC episodes. But to be honest, I really didn't apply all that much. I think that your particular deck just has some really good sharpening capabilities.
There is no doubt that there is more detail in the PAL tapes. It really is a shame about the blended NTSC->PAL conversion.