The only difference that pops out at me is corn syrup vs. sugar. However, heat plus the acid in the tomatoes and vinegar is going to cleave sucrose into fructose and glucose anyway, so you are getting the same thing, ± a few percent fructose.
Tomato vs. tomato concentrate could be a real difference or a differences in labelling regulations. Ketchup is cooked, so I'm not sure how much it matters that some water was removed before or after things were mixed together.
The rest are just differences in terminology. Spirit vs. distilled vinegar are US/UK terms for the same thing. "Natural Flavoring" is probably equivalent to "Spice and Herb Extracts." I'm not sure if there's onion powder in the UK version, but it might count as a "spice" (it's in the spice section at the store, after all).
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The only difference that pops out at me is corn syrup vs. sugar. However, heat plus the acid in the tomatoes and vinegar is going to cleave sucrose into fructose and glucose anyway, so you are getting the same thing, ± a few percent fructose.
Tomato vs. tomato concentrate could be a real difference or a differences in labelling regulations. Ketchup is cooked, so I'm not sure how much it matters that some water was removed before or after things were mixed together.
The rest are just differences in terminology. Spirit vs. distilled vinegar are US/UK terms for the same thing. "Natural Flavoring" is probably equivalent to "Spice and Herb Extracts." I'm not sure if there's onion powder in the UK version, but it might count as a "spice" (it's in the spice section at the store, after all).