I'd expect these two dacs to sound quite different from each other. I'm with melm on this, 005 neutral voiced, I'd expect the Lab 12 to be the warm dac here.
I've compared the 005 directly with LKS 004, Okto Dac 8 stereo, Auralic Vega, been partnered with three different amps, EL34 push pull, 845 SET, 300B SET, and two pre's, Schitt passive and Coincident Statement MKII, also with a number of different streamers. I've never detected warmed over sound, I consider warm to be somewhat fat or resonant bass, somewhat veiled, rolled highs, none of that here. If I heard anything off neutral its been opposite of warm, therefore, just a bit analytical. Okto and Vega warmer, 004 far more analytical.
005 is a great dac, recently spent $16K on analog upgrades vs using those funds for another dac. Highly resolving, transparent, capable of analog like sound, ie, refinement, ease, harmonic development. 005 will simply expose existent sound qualities of one's system with greater resolution, transparency than dac its replacing. I can't fault this dac in any way, not just a value piece, its fine dac at any price. Check out the comparisons to other far more expensive dacs, yet to see it considered to be out of its league vs any of them, has been preferred in some cases. Taking into account those comparisons and my own experience I don't feel need to replace this relatively cheap $3k dac.