Ask them how they are better. A lot of this is just people repeating internet lore. Manufacturing techniques and precision are a hell of a lot better now than 30+ years ago. The main complaint I've read about on the new Pythons is the trigger could use a little work. I find the one on mine to be damn good. And I can always send it out to have it reworked if I want. I see no point in spending $1000+ more for an older one just for nostalgia and maybe a slightly better trigger (maybe). But it ain't my money, spend it how you want.
I think it's the legend/ folklore of it.
Similar to guitars.
I bought a new Fender Stratocaster back in 1994. It was made in Mexico .
It took me probably an hour in the store picking out the one I wanted .
Felt and sounded great.
Some of the guys were giving me hell about it.
I didn't care.
There was an old man where we played music that wanted to look at it.
After about 10 minutes he said it was better than the new Strat he had back in 1957.
Those old Strats go for a LOT of money.
He said the wood was better back then , because they didn't rape the forest for everything.
But, the finish, the CNC routing and wood working was a lot smoother.
The metal parts were better.
According to him those old guitars had a rough finish with laquer, and the insides looked like a beaver chewed on it.
He said the age of the electronics and capacitors made a difference in the sound.
I think compared to other pistols around the same time when the Python came out, it was fantastic.
The extra cost and fitting made the difference.
Now modern machines make the first one off of the assembly line feel just like the last one.
Maybe some minor differences.
It's the same with these pistols. Unless there is a great difference, I'll go with the newer one.
Price wise, I wouldn't shoot an older one and it would be a safe-queen.
The same way I'm playing a $350 guitar.
Let the rock stars have those $60k+ instruments.