Why is PhpStorm ~25% more expensive from Europe?

Hi,

I was looking at the prices for a license of PhpStorm, and noticed that apparently when you're from Europe you're being discriminated against, with a 25% price increase!

While the price for the rest of the world is $99, in Europe it's EUR88 which is about $125! Now that is quite an increase (to which one must even add another 19% increase, due to VAT).
(I used the personal license as an example, but the same applies to the commercial one.)

I am curious as to why there is such a difference, since the product one buys is exactly the same, there are no shippement of any kind, nothing to justify this.

I would also like to know if there's a country that gets a lower price, in which case I might be from there...

Thank you for explaining this to me,