Don't know, :bigjoint:, but I think both of them are 160 mm wide with sixteen 35 mm fins, the only difference is in the base height: 8,5 (1071) vs. 9,2 mm (1072), in inches 0,335 vs. 0,36.
My :bigjoint:attempt: 1071HS estimate perimeter in mm, as if all fins were straight instead of tapered...