Is it for the cab you posted in the other thread? Keep in mind MDF cabs do tend to be a bit darker than plywood cabs too!
And I don't know about other closed back cabs, but my Orange 1x12 and my friends Mini Recto 1x12 were noticeably darker under the mic than my Marshall 4x12. I think there's the common misconception that larger cabs are just bassier. But in fact, they're just broader, both in lows and highs, IME.