I wouldn't say is nothing because there is a difference because most likely you may have missed something during your tests and observations(I assume you have progressive mode enable on your 56).
At home, I have the Panasonic DVD-A470EN, 56 and 82 and can see the difference easily on all three. I tested them by watching DVD anime(you can tell instantly with this) or movies. They were all hooked up to my Hitachi TWX 57" widescreen.
I have also tested the same 3 units on a Panasonic direct tube TV(has no component or progressive) and I can also see the difference using composite video input.
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I'll just add this comparison for Panasonic units here as a reference.
http://www.hometheaterhifi.com/cgi-b...deInt=0&mpeg=0
At home, I have the Panasonic DVD-A470EN, 56 and 82 and can see the difference easily on all three. I tested them by watching DVD anime(you can tell instantly with this) or movies. They were all hooked up to my Hitachi TWX 57" widescreen.
I have also tested the same 3 units on a Panasonic direct tube TV(has no component or progressive) and I can also see the difference using composite video input.
--
I'll just add this comparison for Panasonic units here as a reference.
http://www.hometheaterhifi.com/cgi-b...deInt=0&mpeg=0