It's safer in that they don't sell your data for profit like US based email service providers, I'm talking about Google specifically but it applies to others as well. However don't be fooled, Switzerland is part of the EU and still subject to the EU and it's dystopian nonsense despite Switzerland's reputation for protecting privacy. They will also still turn over records if presented with warrants requesting them to do so. Frankly privacy on the Internet functionally doesn't exist anymore, it should be assumed that either the platform your data is hosted on or the government itself is monitoring everything you do