Duelund cast Pio Hybrid Copper/Silver or Rs series with Silver Bypass PIO

I bought Duelund RS for high frequency part of my crossover.
I did some burn-in using Frybaby2.
I like results. Sound is unbelievable transparent! Now my Altec 604 can be compared in this regard to Lowther based speakers.
I have second order LP filter for mid-base driver of Altec 604.

Will changing of capacitor in 2nd order LPF do the same huge effect?
I need 8uF capacitor. Will Jupiter VT Series capacitors good a match for LPF for my Altecs?

Jupiter caps are excellent and are the best "bang for your buck" brand. The Flatstacked series which I'm familiar with has a natural tonality and open soundstage. 

I would not think the Rs is comparable with the Jupiter copper series.   The cast duelund to me sounds better than the jupiter copper series.   Has more organic, lively and romantic sounding.  

Hello.
So which one sounds better in the crossover - Jupiter Cu or Duelund RS?

I have seen little mention of the VH Audio Copper- Teflon caps I have been using 
these and for resolution none better ,but take up to 4-500 hours runin time.they are flighty warm ,but not much speed and resolution
for a bit more air  and  depth the Duelunds are vest