Well I suppose that just depends on the situation. I think that's really a hazy topic these days. Plus, I think it becomes extremely relevant whether you track to tape versus digital in the first place. And how good a job the engineer did. So you really have to consider that.
I think the engineers that where really alive during the analog to digital technology boom can compare the stats better than I can.
-Mixing completely inside the box.
Pros: Extremely flexible in the fact that you can automate just about anything, mix and match things in a non linear fashion, editing is alot more flexible, etc. Also, non destructive, which alot of people rave about.
Cons: You're subject to all the potential shortcommings of digital. It could be that the tracking engineer who relied on a Neve 1073 for the last 15 or 20 years to analog tape, suddenly gets effect he dosn't like when he goes to digital (on the same preamp/mic combination).
A/D converter qualities start becoming a factor. Wordclock sync becomes an issue. Resolution issues and unessessary conversions degrade signal.
The way it was tracked takes enormus effect. Cause then you have to consider what preamps may translate better to digital. You start looking into certain microphones with smoother high end response. Plus you get more dynamic range to work with in comparison to analog.
Also, you tend to realize that certain plug-ins cant be pushed like some outboard gear. So you eventually incur the cost of needing some really nice outboard gear.
I think more importantly, it really comes down to the dangers of miseducation. Digital tends to be approached differently than analog in some aspects.
Mixing on the "console", if I can afford it or I get a project that funds it, is a better route for my tastes. But that's only if I can suggest a place with a console of my choice for mixing purposes. Also, you start seeing that there are consoles out there (refering to large format) that do well in the mixing stage, but maybe not so desirable for tracking. And vice versa.
Like some engineers might track on a neve and mix on an SSL.
If you think about it, everything that you put that signal through is an FX unit in it's own right.
Anyway, my two cents.