Baffled about chai seed macros in the UK

Two months back when starting keto I bought two large bags of chai seeds from Costco, after seeing them in so many recipes online.

When I got home I was checking the labels and to my surprise there were more net carbs in the chai seeds than I expected. Here's the label.

However when I was in my local supermarket today, I saw some chai seeds that looked almost the same, but with much less net carbs, label here.

I'm aware fibre is already subtracted from the carb amount on UK labels, so our carb reading is net carbs, but why is there such a difference between 100g of chai seeds between these brands?