HQ vs LQ? Is there a visible difference?

[goddi]

Greetings,

I am getting more into creating MP4 files. I have Created two 'MP4 HD (1920x1080) Video for PC' slideshows from the same PTE show. One was created in HQ; file size is 165Mb. The second file was created in LQ; file size is 64Mb.

The 'problem' is that I don't see a difference in quality. I am wondering if anyone else has done this comparison and come up with the same conclusion. Of course, I'd rather be creating smaller sized files if there is not visible difference.

So I'd like to know if there really isn't any difference in what you might see between the HQ and the LQ results. I have played the two shows on a 40" LED TV screen and I can not tell the difference.

Thanks... Gary