Compare:
both offer High CRI, (I dont know how the color and tint compare)
both use “constant current” (I don’t know the Flicker index for the Manker compared to the Zebra)
Both have similar mode options
and Contrast:
E03H
Weight according to REVIEW MANKER E03H XPL
81 grams w battery and no headband (45% heavier than Zebra)
Cost $30
Not potted?
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H53c
Weight according to http://www.zebralight.com/H53c-AA-Headlamp-Neutral-White-High-CRI_p_194.html
56 grams w battery and no headband
Cost $59 (97% more expensive than Manker)
Potted