Bought the SBH56 from seller "Allizwell2k10" total impulse buy after reading about it shortly. Figured it was safe and after you factor in a bluetooth adapter and a USB-C cable it was worth the extra cost to make sure I received a legit one. Definitely sub-bassy which is ok for fun ones. I quickly looked through the ones I have measured and came up with several earphones that border on the Harman target curve but each with slightly differences, mostly in the bass region.
-KZ ED9 gold and brass filters
-GGMM C800 (relatively unhyped around here, but some heavy chi-fi users said these were ones to get. Can be had for $10 most of the time.
-MW755 (mine are bassier ~5db more than what
@crinacle measured, but my measurement system is not calibrated)
See graphs here, I don't have any qualitative impressions at this time.