Yeah, you're right. Unreliable source material. Viewing a video of a restored Fw-190D-9 shows this with certainty, as (what do you know...) it sounds almost identical to a Bf-109. So, it appears that my original usage of the DB600 series sounds for the Jumo 211/213, considering they're almost identical engines (barring supercharger configuration), was the correct decision.
I'm beginning work to fix this oddity.