Which is better for Quality - Pana DMR-EH50 or Pioneer DVR-533H-S

Has anyone compared the Panasonic DMR-EH50 and Pioneer DVR-533H-S decks for quality when transferring DV tapes to DVD using the firewire input on the Pioneer deck verses the S-video input on the Panasonic?

Is there a NOTICEABLE difference in quality using a DV camcorder S type output verses a Firewire output for transfer DV tapes to a DVD recorder?

I recommend Panasonic due to the fact that It is a more acurate and more reliable.