[bob tyson] "Question is, is there a quality difference between the two?"
How can there be any difference in quality? It's digital.
If you had asked the difference from DV and HDV tapes, the answer would have been: "The price".
Before I went tapeless five years ago, I would run the cheapest Sony Premiere tapes in my Sony Z1 - never a problem after about 200 tapes.
Steve Mann
MannMade Digital Video
http://www.mmdv.com