Choose Hetzner when a European location and more RAM on the entry plan are the point. Choose Vultr when you need one of its many cities and you can accept hourly billing, including the chance that IPv4 raises the $2.50 entry price.
Hetzner
European cloud servers with a lot of RAM for the price
EUR list price
Strengths
High included traffic on EU locations
Entry plans include more RAM than typical $5 VPS tiers