I was using a toppy 5000 with scart to component before my tivo (HDMI)...

The component 'seems' to have more colour balance, the hdmi looks a bit more washed out..

Then again, this is probably down to the tune of the TV (NEC 50 Plasma) rather than the devices...

I did have a guy come up from Melb to Syd to tune the tv when I first got it, it made a huge difference and I remember that he had different settings for each input...