I ordered a bit of both of these fabrics for a backpack project (straps and bottom material) I'm about to begin, and figured I would share some photos here if anyone else was unsure how they differed (the photos from both websites make them look very similar despite their weights).
Black = Dutchware's 300D Pack Material @2.7oz/sqyd and Grey = HyperD 300 from ripstopbytheroll @3.9oz/sqyd.
The HyperD has a visibly tighter ripstop and an understably stiffer feel (albeit slightly). The coating appears comparable on both. Likely I will end up using the HyperD on the bottom and the "pack material" on the outside of the straps.
I'll let y'all know how they cut & sew once I start.
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