a channel strip is the entire channel (only one) from a console.
typically it includes (but is not limited to, nor does it mean it has all of this) mic pre, EQ, aux sends, buss routing, line amp.....
most of the time the fader packs are not included.
channels strips are cheaper typically because they come from crappy consoles that some people are trying to tell you are awesome.
older desks (like some neves, helios, api, calrec) have individual modules for each section. that is why you see a Neve 1066 (mic pre EQ) and not the whole channel strip. (because there isn't one.)
