I don't have a lot of these dandies like Bac and Zeleny; only have a Swiss and a German to play around with. To me, they're cool but not so cool as to buy a bunch of variations, though I might try to find the P49 just because it's the original.
There are several internal differences between the SIG and the SIG Sauer, and Zeleny would be the one who can expound on them with any sort of intelligence. Since that I am but a layman when it come to the 210-family, I'll just address some of the basic ones:
1. Sights: the -6 has a narrow front and U notch rear that is meant for some fine, long range accuracy work. The Legend has a wide front with a rectangular rear that splits the difference between long range work and close range fast shooting.
2. Finishes: the -6 has a matte blued finish while the Legend has one of those black "miracle" finishes - I think it's the Nitron coating. Whichever way, they work. Though I think that the Nitron finish helps the Legend's slide feel a bit smoother than the -6.
3. Safety levers: They're both at the same spot and work the same way but the Legend's is easier to manipulate while the -6 is extremely stiff but "click" positive to put on and off. Neither of them are good for quick flicking on and off. Interestingly enough some of the Legends like the Super Target has the safety ala M1911 style.
4. Mag release: the -6 has the traditional heel mag release and the Legend has the side button American style release. The side button mag release is convenient but the heel release is impossible to be accidentally activated. You will never have to worry about bumping against something and the mag'd pop out with this sucker.
5. Beavertail: The -6 doesn't have one and the Legend does. If one were to do the high grip style, the -6 will draw blood with hammer bite ala M1911 with the original rat tail grip safety. Will it kill you? No, but definitely distracting with the shooting drills, I can tell ya.
6. Magazines: They aren't interchangeable but there are some similarities: both are extremely stiff to load, they both have the zipper spines. The original mags are nigh impossible to get - one would have to cruise the German's equivalence of Craig's List to buy them and they usually cost $150-200 Uncle Sam for a beat up one. The Legend's were easier to get. Or at least used to be easier to get. A bit cheaper too at a mere $97 MSRP a pop.
Both guns are beautifully finished inside and out. It's Swiss watch quality in the -6 case and German watch quality in the Legend case. I don't have German watches but I do know a few people with German watches and these things ain't no chump change. Analogies aside, let's get on with it.
The Legend is the top one because Deutschland Uber Alles.
Yes, the Swiss gun drew blood (the way the Swiss banks charges interests). The battered skin is right next to the scar from where the Colt M1911 (not M1911A1 but M1911) took its pound of flesh.
The ammo were American Eagle FMJ, Hornady XTP and Gold Dot JHP. Amazingly enough the P210-6 ate the hollowpoints with equal aplomb as the Legend. Honestly, I didn't think that either would eat hollowpoints because both of these guns were made for matches.
Lastly is my shooting notes of these two guns.
Chicks dig hammer bite scars.