The Tao Of SuperBlackHawks:
If you buy a SuperBlackhawk, it's *usually* a 44Mag. Unless it's the 357Supermag, or the 41Mag/45LC variants of the SuperBlackHawk Hunter. And the 44Mag Bisley sorta "should" be called a SuperBlackHawk if Ruger was being consistent - see also the hunter section.
OK, let's look at the Hunters as their own class of weirdness:
All single action "Hunters" carry the SuperBlackHawk moniker even if they're NOT 44Mags (41Mag/45LC). Also, there's a Hunter available with the Bisley grip/trigger/hammer setup that still known as a "SuperBlackHawk". "Hunters" have a heavier barrel with integral scope rings - that's what makes it a Hunter. When Hunters don't have a Bisley grip, they have a special round-trigger-guard version of the Dragoon grip frame. This is a slightly oversized grip type that's basically a scaled-up "Plowhandle" type grip - this Hunter grip frame can take the same grip panels as the SBH "Dragoon Squareback" grip.
(My personal opinion: the hunter with Bisley is a VERY intelligent combination...it's what Ruger should have started with when they thunked up the hunter barrel. OH, and there's now a Single Six-based "Hunter" with a heavy barrel and scope rings - that's a whole 'nuther frame, 'nuther critter. WAY smaller, easy to spot
.)
Non-hunters:
If it's a SuperBlackHawk, it's a 44Mag or the short discontinued run of 5,000ish 357Maximums. Those can be identified by the stretched frame and cylinder.
The 44Mag SBHs with 4.68" or 5.5" barrels have the same size grip frame as the standard Blackhawk (the "XR3-RED" grip) but if the gun is blue, the SBH has a blue steel grip frame, the Blackhawk's is black anodized aluminum. The Blackhawk ejector rod is also black anodized aluminum; the SBH has a steel ejector rod. Always. Yet stainless steel blackhawks and superblackhawks both have the exact same stainless grip frame if the SBH barrel is 4.68" or 5.5". SBHs with 7.5" or 10" barrels always have the "Dragoon squareback" oversize grip frame, in blue steel on a blue gun, stainless on stainless guns.
Blackhawk and superblackhawk rear sights are identical. Some SBHs have a better replacable front sight where a blackhawk's front will generally be soldered down.
Superblackhawk hammers are a lower, wider piece about halfway between the Bisley hammer and standard Blackhawk hammer in terms of "reach". Many find the XR3-RED grip on the 4.68"/5.5" SBHs with the SBH hammer a very nice ergonomic combination.
Strength is NOT different. All of these guns (Hunter, Bisley, Vaq, Blackhawk) use the same strength primary frame, same strength and size cylinders, all with the same heat-treat. You can take a 357Mag stainless Blackhawk, swap to the SBR hammer, bore the cylinder up to 44Mag and swap barrel to a 4.68" or 5.5" barrel and you will have a gun absolutely identical in every way to a factory superblackhawk of the same specs - and your modified gun will be 100% as strong. Only a serial number search would spot your gun as a "frankengun"
.