Well all the passive components make difference but question is will you be able to hear such difference in the sustem you've built. Can you please describe your system and I might be able to give you a better idea.
As far as saturation - well you using same value caps/coils so you obiviosly not doing it for saturation LOL
As far as higher order x-overs - typicaly high orders passive sound worse (dead , more synthetic)- not better, but it's a system design/driver choice which dictates most appropriate x-over design.
About caps in power supply beeing marketing gimmicks - wit amps slew rates is in high100,000s volts a secconds I would like to see any battery at any price capable of not needing lockal buffers LOL

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