Spotlight vs Type to Siri

I’m just wondering with iOS 11, what are the main difference between Type to Siri (home long press) and Spotlight (with Siri suggestions) (swipe down). Which one should I use to do what ? (ie, I’m in Europe, we only have few Siri features compared to the USA).

Actually there’s nit that much difference between the us and eu. (And I’m also in the EU, but have used a US iphone for work for a couple of years)
I find type to siri is good at parsing more natural language, while spotlight is (just) good at finding apps, messages, emails and simple stuff. Nowadays I mostly use type to siri.