If you have switched from a Hauppauge WinTV PVR 250/350 to a Vidac/VMagic card, how would you compare the quality of the recordings?

I'm pleased with my PVR 350, but after reading some reviews of the Vidac/VMagic card I'm wondering if the VMagic cards produce a better MPEG-2 result.

I have no issues with the Hauppauge drivers or support, I was just curious as to the quality of the output.

Thanks.
Mike