What I can tell you I can tell you is this. I am a supervisor for a railcar repair shop. We use the dual shield set up on everything but stainless steel and aluminum. From 1/8" steel to 3" steel. Naturally with different processes but the intent is the same. Codes have to be followed with the FRA and AAR for standards in repairing rail cars. To meet those standards it is more cost effective and efficient to use the dual shield wire. Granted we are using it on a 600V Miller welder with bulk gas supply (CO2). You can also use CO2 with a smaller welder (115V) it will cool your weld temps down so you might have to turn the heat up to make up for the difference, but it can be done! And it's cheaper than buying 75/25 (argon mix). The welds are easier to wet in with the soft wire (flux) and easier to run in all positions, to me anyway.
The process is done all over the welding industry, I remeber when we were converting some railcars into a different product line, that we were buying dualshield wire by the pallets and if I remember correctly we were paying $3000.00 per pallet. We ran ESAB wire and to date it is better than what we are using now.
It's early in the morning and I'm at work so if I'm babbling it's cause I'd rather still be in bed!! LOL