Thus this is more evidence of ads causing brand confusion than memory implantation. And underscores the importance of an insight that is already in trademark law - that people will easily mix up a brand that is similar to an existing brand with the existing brand.
These are not really great examples of brand confusion IMO. In the name "Orville Redenbacher" is considered the origin whilst the remainder of the name is the particular product. Both of these are claiming the same origin (company/person). This isn't brand confusion based on similarity it's a direct rip-off. To make that point clear the consumer isn't confused about the origin they have been conned. Maybe it's a bit of an esoteric point.
Gourmet Fresh Microwave Popcorn and Gormet Popping Corn are two different products in two different geographic regions.