1967 Barracuda Underhood Insulation Pad w/clips
I dont know how there could be a lot of difference in them ( other than price ) if they are made from the same material as OEM. It's just a piece of insulation. I like the looks of the molded ones with a more finished outer surface. I assume it wouldn't collect as much dust as the OEM material.
I know a mouse will use the original as nesting material under the throttle linkage. That probably applies to any of the different types though.
This is what I would buy for my 67...
http://www.ebay.com/itm/MOLDED-HOOD...Parts_Accessories&vxp=mtr&hash=item4aaf6a670c
Just be sure you're happy with the hood inserts and they dont leak before installing the insulation underneath.