Here is my take after experiment them in my gears:
If you like extreme detailed sound then go with exotic teflons. If you like musical and smooth transition sound then go with oil caps. The teflonss will be more crisp if that's what you're looking for. I use the vintage sprague oil caps because they're cheaper. Supposely the more expensive teflons can provide both but I won't spend a fortune to replace more than 2 dozen of them in my preamp. You're talking about $60 vs over $800.
If you like extreme detailed sound then go with exotic teflons. If you like musical and smooth transition sound then go with oil caps. The teflonss will be more crisp if that's what you're looking for. I use the vintage sprague oil caps because they're cheaper. Supposely the more expensive teflons can provide both but I won't spend a fortune to replace more than 2 dozen of them in my preamp. You're talking about $60 vs over $800.