Just for fun, here's a comparison of retartedted's version of Great Heep, which he had to standards convert from the same PAL release I used. I'm starting to suspect the subdued colour in my versions is just the playback characteristics of my particular VHS player (a Philips cheapo) and may not be source related after all.
Anyway, here you can see my RAW PAL captures and retartedted's noise-reduced NTSC conversion. To be fair, the noise reduction is more obvious on the Great Heep episode so I believe he applied a heavier setting than on his native NTSC transfers.
RetartedTed: Top, VideoCollector: Bottom