This is bizarre to me. Do you always shop this way? Personally I find a favourite brand and stick with it. There isn't a single product I can think of where I'll buy the same thing from multiple brands.
Two responses:
1) And by what process exactly do you find a favorite? Clairvoyance?
2) If you can have a favorite, then the different brands must have different qualities. And if different brands have different qualities, then they will be differently good for different uses.
> "There isn't a single product I can think of where I'll buy the same thing from multiple brands."
They aren't the same thing. They're differently-prepared multi-ingredient products. They're often not even the same species of fish, because "sardine" is a general category not a species.
Weird, I'm the complete opposite. There's no product I can think of where I didn't buy different brands, if anything just to compare.
I don't even like Sardines but I definitely understand there's a ton of variety in flavors and packing styles and even the species of fish can be a little different.