Ok- so I'm just doing a bit of self educating and I think I understand what all the fuss is about. See if this makes any sense:
The HF 44", which is actually a 40" box with a 4" handle, is 4" wider and 1" taller than the the bottom of the line Snap On KRA2407. In the store, I found the HF 44 looked impressive and felt impressive too. The drawers were smooth and I liked the latch mechanism.
But the SO box is deeper front to back (24" vs. 18-1/2"). Consequently, it has 20% more drawer surface area, roughly twice the drawer capacity in weight, bigger casters, and is 70lbs heavier. It also takes up less wall space if that is a concern.
List price for the KRA2407 is $2600, but stories abound of leftover and discounted prices which bring this box within reach of most of us. All Snap on boxes seem to hold their values well. Snap On tends not to discontinue models, instead offering upgraded features for an ever increasing list price. That means, if you can score a good deal on one today, you may be able to sell it years from now for almost what you paid for it. In my book, that makes it an inexpensive box, not a waste of money.
For fun, I looked up the specs on a Lista HS series roll cab. These are roughly similar to the afore mentioned boxes; 40" wide, 41/12" tall. The Lista HS is deeper than the HF, but shallower than the KRA. The big differences Lista offers are the drawer capacities and the overall weight of the box.
At 440lbs per drawer, Lista offers the most capacity. The basic KRA drawer slide gets you 120 lbs of capacity, but the top drawer doubles the slides which doubles the capacity to 240lbs. HF lists their basic slide at 59lbs per set, but the top drawer, which features double slides is only listed at 80lbs. That may have something to do with the construction of the drawer. But even at 120lbs, that big drawer could easily be overloaded.
My guess is, most mechanics don't need to store 400lbs of tools in a toolbox drawer. But it might be nice to know you can fill a drawer with sockets or wrenches and not have to think about overloading, something you surely can't do with the HF box.
The other difference is the overall weight of the boxes. The HF box is 245lbs empty. Snap On's KRL is a stout 320lbs. The Lista breaks the scale at 530lbs. That's twice the weight of the HF box. And remember, all of these boxes are roughly the same size. If you are interested in a toolbox that will withstand bumps and knocks, look no further. On the otherhand, if you need to move your box and don't have a forklift handy, you may need more than a 6-pack and a couple good friends to move the Lista.
The low cost and convenience of purchasing a HF box, combined with "good enough" features, make it an easy decision for many serious or even pro craftsmen. But to consider these very different boxes somehow comparable is a mistake. Yes, they all hold tools, but analogies offered like "ford focus vs. bmw 3 series" miss the mark. The difference between those 2 vehicles is chiefly luxury, not utility. A better car analogy might be Ford focus, Mercedes S class, and Dodge Sprinter. The S class is fast, roomy and capable, as well as glitzy, just like Snap On. The Sprinter is a bit more utilitarian, but strong enough to carry the Focus, full of passengers and not break a sweat (the Lista box can almost hold the weight of 2 HF boxes in each drawer)
The key to choosing the right box is putting passion, politics, and perception aside and choosing the box that best fits your needs. Getting an approximate weight on what you would like to store in each drawer is a good first step.
I have an xlsx spreadsheet with the data on it if anyone is interested. I recommend we make it sticky.