These are quite close - a lot of what I think we are hearing is the room or mic. I did check and these both appear to be normalized to -17dB LUFS with 0dB peaks - suggesting some processing was applied. In Audacity (not a scientific tool, I know), the difference in spectrum plots is fairly minimal, within a couple dB. There's a little more, or perhaps smoother, low end hump in d2, but they both have dips and peaks that match so closely I'd want to try a different room and/or mic before making a sell decision.