gnerally yes. but much depends on encoder's skill.
..and there are absolutely no connection between formats and resolution size.

Video dimension and compression format must taken into consideration too,
Large file size not necessary mean its better quality, unless you are comparing 2 video with same dimension, playback duration and compression format.

For example if i uploaded a uncompressed RGB video(hundreds GiG) to a net, again i uploaded a h264 compressed video(10GB), both are from same source(MPEG2) btw,
which one will you download?

Its same for Image and Audio too.

This post has been edited by 1024kbps: Mar 21 2011, 06:35 PM

Yup,

But it depends on some people, if you want less hassle of someone encoding wrongly from the original source, take latter as it's safer but compromises on size.

MKV is the best. You can include chapter ordering too