It's a bit of semantics, but I know what mixerdude is saying. If you use the LE system WITHIN it's limits the difference is little if any.
ADC is only important if your introducing latency (although there's manual correction...but still) The mix bus...I don't know about that TBH, but just to be the devils advocate, there is a camp that believes floating point math actually sounds better than fixed point - I don't remember the reasons.
Now if the mix is less than 48 tracks, manually corrected latency, and you know how to gains stage properly within the digital domain, I don't think you would be able to tell the difference between HD or LE - but if you use better converters than 192's on an LE system (I personally find them prosumer, and especially troublesome if you have unbalanced gear like API or Helios (just to name a couple of classics) you can actually achieve better results.
But what an effen way to work

I also disagree that LE would make sense for tracking - too much latency for cue mixes, and what if the singer wants verb while tracking....a big PITA.
So while you can work around all these issues and perhaps achieve close to "just as good" - you probably never will. The workflow is just too screwed up in LE. Now OTOH, if your doing Singer/Gtr stuff alot of these issues might be moot.