So, I'm new here, don't know squat about revolvers in general, and know even less about Smith and Wessons. What I DO see is a complete lack of personal preferences that might be important. For example, I wouldn't own a nickel plated gun if you gave it to me. But the only common factor I see in your choices is 4". Right this minute at Guns International is what appears to be a near-mint 6" 586 for about $600 bucks. It's not a 44. Is that important to you? That's what makes this hard for me as a newbie: how can you be equally satisfied with a .38 or a .44? Is this a range/plinker?
I just got started in revolver, don't have my first one in hand yet. But what I DO know is that some time around the mid '70s I saw The One. It was the revolver of my dreams, in .357, and it "looked like this". Now, 40 years later or so, I found the gun I wanted, even though it turned out to be a 629.
I don't know...I'd think you'd be able to center in on some key features, even if one of them is price. I don't know squat about revolvers, but it just feels to me like you've selected two that have one thing and one thing only in common: the price. Given that inference that I've made from your choices, and disliking plated guns more than I dislike two-tone shoes and chrome on motorcycles--I'd just go with the .357. That's advice to you, free of charge on the internet, from a guy who has never owned a revolver.

Internet is amazing, isn't it?
Look at Guns International #: 100506231 and ask yourself if this is not an absolutely gorgeous specimen, and if any plated gun showing signs of poor care is worth half as much.
Here's MY bottom line: I don't 'collect'...I shoot. I don't like 'pretty', I like functional. That said, pitting or corrosion in any gun manufactured in the 20th century is just a sign of carelessness. I have a 1911 manufactured in 1929 bought for $75 at a K-Mart--no pitting or corrosion. Guns aren't plated, bumpers are. Is there a revolver cartridge 'better' than the .357 for other-than-hunting? I wonder.