I have to say that this goes completely contrary to my findings too.
My Caiman is fully tricked up, caps, regulators, linear supply and either gaitor board or passive mod. The Bushmaster blows it out of the water. Much tighter and lower bass, more defined imagining, and crystal highs.
Very strange.
Val
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Digital Source: iMac > Modded Airport Express (linear supply with Supperteddyregs, wireless card removed) > Bushmaster DAC, Battery Powered
Analogue Source: Kenwood L-07d / Benz Micro LPs > Paradise Phono
Amplification: Self built Nick Gorham el84 loaded 6080 valve line stage feeding Silk TVC's > Lyngdorf RP-1 > Self built 5687/300b PP ITX based on Lundahl & O'Nectics iron feeding Mid & Top and JBL MPA600 on Bass duties.
Speakers: JBL 4344