Going from the N8 to the SP1000 reveals just how stunningly spacious the N8 sounds. The SP1000 sounds closed in compared to the N8. The SP1000 does have this unique holographic quality though. Instrument separation wise the N8 edges out the SP1000 simply due to the sheer size of its soundstage even though the SP1000 is more holographic.
The SP1000 is thinner sounding yet despite that the N8 exhibits better low end control. From the lower mids onwards SP1000 is ever so slightly clearer but its most noticeable at the lower mids. N8 mids are smooth yet meticulously detailed, reminiscent of R2R DAC designs. The SP 1000 on the other hand is more aggressively detailed and drier. I'd say the mids on the N8 are more natural in comparison to the more digital sounding SP1000. The SP 1000 has a touch more treble sparkle.
Despite all this I wouldn't really call the N8 a warm Dap. Neutral with a very slight warm tilt suits it better.
Overall, I'd prefer the N8 over the SP1000. The soundstage is simply unmatched in the portable source market.
Kudos to Cayin
This is a stunning summit-fi product.