First, Phil and Grace are right as far as true commercial stoves in the home go. However, if I read you correctly, you're asking about commercial styled residential stoves, i.e., the "cut downs" Grace referred to.
I've had two commercial styled residential stoves over the years, both Vikings. The first was built by Brown when Viking contracted with them, the second built by Viking's current contractor (I forget who that is, offhand). I enjoyed the heck out of them.
Generally commercial-residential stoves are far more finicky, difficult to clean, liable to break and require time consuming and expensive repair, then a regular residential stove (or two) supplying the same amount of oven space and surface-burner acreage.
The extra BTUs commercial-residential stoves supply versus ordinary residential stoves does not equate to any improvement in sauteing, or any other type of cooking -- with the exception of bringing very large pots to temp quicker. Restaurant cooks actually use the extra heat from commerical stoves to preheat (and ruin!) pans quickly, rather than to actually cook anything. There are very few things cooked on a home stove that require more than "medium-high"heat.
However, some of the commercial-residential stoves do have extra features that either aren't available in ordinary residentials, or are just beginning to move in at the most expensive level. High performance broilers, for instance.
The main difference is styling -- and it's a significant difference. If you like the look and can afford it, you should buy it and not look back. When it comes to choosing the particular make and model -- try to research ease of cleaning and availability and cost of local repair, those are very important features but not particularly obvious. IMO, American is probably the best one currently available -- if you can get it fixed when it breaks.
Residential Ranges by American Range
From a performance standpoint, a Wolf won't make you a better cook than a Viking, or a Viking make you better than a run of the mill Kenmore. But your kitchen is not all performance is it? It's a place you spend a lot of time, and there's not reason in the world it shouldn't be beautiful and make you feel good about spending time there. And the extra space is very helpful. A commercial style range is one of the few appliances that adds its cost to home value, too. At least if homes ever have value again.
You might not be aware, but a number of "commercial" builders don't actually build the residential stoves which are sold under their names. Wolf residential is owned and built by Sub-Zero -- the only relationship with Wolf commericial is the logo and the name. I think Viking actually left the commercial stove business -- and in any case their stoves are contracted out. And so on. This has a lot to do with the way stoves are built generally, which includes assembling chassis, but buying a lot of generic components from third party manufacturers and vendors.
If you want to increase your knowledge about the distinctions between commercial, commercial-residential and regular residential, we can help you.
If I were putting together a kitchen today, I might choose a top of the line residential for all the features (convection oven, continuous grates, etc.), and add a second, less expensive stove for extra burner and oven space -- or I might choose a commercial-residential with a grill, a griddle, infra-red broiler, convection oven, really sharp looking grates, a big stainless riser, etc. What can I say? I like cooking toys.
You weren't really asking about this, but I almost certainly would not put a true commercial in a home kitchen, unless I were building the kitchen around commercial equipment. One: You don't need it. Two: Most of the extra performance a commercial stove brings is either not important, or counter-productive. And three: Commercial stuff is noisy.
Dual fuel by all means, no matter the style of the stove. If there's still any advantage to a gas oven, I don't know what it is.
BDL