Verdict
Choose DigitalOcean if you want a polished beginner path, strong tutorials, and a broader developer platform around the VPS. Choose Vultr if you want simple VPS experimentation, broad region choice, and fewer platform assumptions.
For self-hosters
Both can run n8n, WordPress, Vaultwarden, Umami, and Docker apps well. The better choice is usually the provider whose region, price, backups, and console you will actually maintain.
Choose by use case