I know what you mean - I only like real Fritos and I only like real Ruffles (when I'm in the mood for a substantial thick potato chip) and real Lays (when I'm in the mood for a light, crisp potato chip). I don't like Wise at all - and never mind even trying the store brand.
The cheaper brands are just a waste of money.
And I can also only eat real General Mills Cheerios (my all time favorite cereal- ever since I can remember eating cereal right up to today).
I don't think I could live without Cheerios.
I think the other companies might use cheaper ingredients or just not get the exact ratio of ingredients or something. With these crispy things, I always notice the texture's different - either oilier or soggier.