Difference : DV500 Plus / Bt8x8 TV Card

[LordVader]

I'm planning to buy a new capture card, but the reviews and comments about the DV500 plus don't help me a lot.

I've been capturing in 720x480 DV Format for a long time with my conventional TV bt8x8 card.

Apparently with the DV500 Plus i'll get this same capture method, but is there any difference in picture quality ?

wich are the advantage in DV500 plus ? ( forget about realtime stuffs with premiere ) , i'm talking about the picture quality .

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-I'm going to get an interlaced image too, with this card ?
-Is the capture, sharper than the conventional TV cards ?
-What will be the difference between the 720x480 DV format of my TV card and the 720x480 DV Format of the DV500 Plus ?

I'm confused about getting this card.

[LordVader]

Please