Quite simply, there is no difference. Jacuzzi is a trademarked brand of whirlpool bath and to give them their full description, they are Jacuzzi Whirlpool baths. Because of the strength and popularity of the the brand-name, Jacuzzi has become to whirlpool baths what Hoover became to the vacuum cleaner… you probably still “hoover” the floor but are more likely to be using a Dyson or a Vax. Such was their popularity that both Jacuzzi and Hoover brands have become household names, and as such generic terms.
There are many manufacturers of whirlpool baths in the UK. Jacuzzi is probably the most dominant, followed closely by and Ideal Standard. Other brands include Bronte Whirlpools, Pegasus Whirlpool Baths and SpaSplash
Another popular misconception is that Whirlpool make whirlpool baths – Whirlpool is a white goods manufacturer specialising in household goods and do not actually make whirlpool baths.
Most bath manufacturers now offer a standard range of whirlpool systems on some of their baths, however when searching for a whirlpool bath from a particular manufacturer, do not be misled by devious web traders which claim to be selling Manufacturer’s baths with manufacturer’s whirlpool system on it when in fact they are passing off a manufacturer’s bath with a cheap self fit whirlpool system on it. A simple search for “Jacuzzi bath” will bring up a multitude of whirlpool baths, most of which are not made by Jacuzzi! If you have any doubt, refer to the particular bath manufacturer’s website and compare what they have listed.