I'm sure I'm in the minority, but I'd take it axiomatic that ALL saddles are evil! All saddles hurt, and that is more true for 50+, not less. Anyone who says they never have saddle pain either has a very short memory or is an outright liar - it's just a matter of how much you're willing to put up with.
That said, you're complaining of a relatively major change in comfort level - for the bad - after a thousand miles? Saddles don't wear out in just a thousand miles. I agree with the others. It's most likely you that have changed - your flexibility, your position on the bike, maybe your new, sexy butt
... something.