Europe just launched DNS4EU, a public DNS resolver with privacy and security options

i'm not well versed in these technologies. how do these two compare? which should i use?

You seem very confused. Do you think that using a different DNS prevents blocking like the recent France porn block? It doesn't.

Do you know why people use different DNS servers to the ones from their ISP? In some EU countries, in particular Germany, this is actually quite private already because data protection laws prevent the ISP from recording and using/selling the info.

You do understand that these servers aren't run by government (s), right?

I might be proven wrong, but I don't think the porn block is via DNS, much more likely that it's blocked from the porn providers side via IP-ranges.