I don't have any more information regarding the Allstate Gordie but I will post the differences in the Henry J standard (4 cyl) and Deluxe (6 cyl) once again:
Four cylinder Henry Js (all years) lacked chrome (stainless) bright work around the windshield, did not have bumper guards, did not have a horn ring, did not have a passenger side sun visor and came standard with the small hub caps. The four cylinder Js (all years) also did not have a second "sea shell horn" - they just had one on the passenger side. The four cylinder cars which were not equipped with an AG did not have a trunk lid, opening wing vents, cigar lighter or ash trays. Contrary to much HJ mythology, trunk lids were available on both the standard and the deluxe models for 1951 (and '52 Vagabond). Only the four cylinder '52 - '53 Js could be ordered without a trunk lid.
And, as you point out, the '51 and early '52 (Vagabond) had painted hood trim (upper grill) molding as opposed to chrome. The most common modification I see on the '51 Henry J is replacing the painted pieces with chrome. We were doing that back in the '60s already and so were a lot of other people as it really does look better.