SZ "was probably" the first to use to Dual compressors and Dual evaporators. The SZ is actually a separate Fridge and Freezer built into the same cabinet.
Some folks, (and of course SZ marketing),claim that this eliminates the "Odor-transference issue", but being here on Terra Firma, for almost 70 years now, and even with my grandmother's old Sorval (SP") gas fridge, I have yet to taste "Odor transferrence".
More than likely you are apt to pick up an "Off taste Flavour" from something that has been kept too long in the Fridge, or Freezer.
Since some folks with obviously more "esoteric taste buds" than me, have detected differences in food stored in Dual compressor fridges---"More power to them" 2 motors take more power than one , or at the very least run more????.
Anyway, the clever Koreans came up with an answer to the folks that had to have "absolutely separated air" between the fridge and freezer. They came up with a single compressor that actually drives 2 separate Evaporators, (dual Evaporators). At least this design is more efficient and less parts to fail.
Some claim the Dual compressor and or Dual evaporator fridges keep things longer, and you will see post here in GW that claim same--but-----read on a bit and you will see folks making the same claims about their new single compressor/single evaporator fridges. A typical post,
"This new fridge keeps food longer than any fridge I've ever had".
Now all thats nice and good unless you visit the USDA website and look at their recommendations for food storage.
Particularly fruits and veggies. Most any new fridge, (Single Compressor, Dual this or that etcetc) will keep said food longer than USDA recommendations. Ya the food may have a nice color, be chrispy or whatever attitributes it should have, but guess what's missing, (according to USDA)??
THE VITAMINS!!!!
So at least (to me), this Dual thing is just "marketing Goobledegoop". A way to get more of your money, without any real benefit to you, and a way to command a higher price.
Now more than likely someone will "popup" from the "Tulies" and say, I can't get to store often, so I must have the "Dualie Fridge" in order to keep the food for a longer time, but recall folks make the same claim for single compressor fridges.
OK fine, but you better "Pop Your vitamin pills" you ain't getting it from anything inside that fridge, even it it has a thousand compressors and or Evaporators!!!
Gary
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Island
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