Tabbykatze
Global currency is in USD, all things international are priced using USD as a baseline, no ifs and no buts. Because it's in USD it also ignores local VAT/duty in each nation once its converted from the baseline USD value. Nothing to do with it being a UK based company or a company based on Uranus (quite nice this time of year as an asside).
Price comparisons between US prices and UK prices vary on several factors, among which is that typical consumer prices in the US are quoted excluding sales tax (because, as said earlier) they vary state to state, and sometimes depending on ex-tax price if you're mail-ordering from out of state. Conversely, prices in the UK primarily for consumers
must include VAT. Those UK prices
might also include import duty (which varies between 0% and quite a lot, depending on which of thousands of codes apply) and even in some cases (though not this) excise duty.
But then, it also depends on what prices the article publisher is using, which could be manufacturer pricing, or “typical” retail pricing in the UK and, within some limits, retailers can charge whatever they like. That £94 price is certainly exactly the same as one common Pi UK supplier, including VAT, so it may well be that that is what's being used in the article and, to he honest, is much more useful for a product currently available in UK retail channels than some notional manufacturer pricing.
So the difference is likely to be some combination of sales tax/VAT, import duties (if being imported), exchange rates and retailer profit margins.
In some cases though, such as when a manufacturer makes a product announcement in advance of actual retail availability, you may get give unit price (per 1000 units), probably in dollars which is a common international currency, but is often not terribly accurate as a reflection of eventual retail pricing but does at least give a ball-park guide.
What would help in articles, though, is a hint at what prices are based on. In this case, either by design or coincidence (my bet is on design) the quoted UK price is current, actual UK price from a large UK Pi retailer.