It depends on what you are installing the caps in to as to what is the better cap version to use, as tbd. I landed on oilers in my source and non-oilers in my amplification. I'll likely replace the copper-oil caps in my preamp with non-oiler Mundorfs too. Here is the latest:
Tube Amps: now running Mundorf Capacitor Supreme EVO SilverGold Black SESG (non oil version) in my Mono Tube amps. Compared notes with an amp designer.
DAC: now running Mundorf EVO Silver/Gold/Oil caps (with oil). Tried both oil and non-oil versions and prefer the oilers here.
Spending up on really good Mundorfs paid off for me, and your results may vary.