You can choose provider according to your requirements but some points I want to suggest you before choosing a VPS provider that can help you
Managed or Un-managed Hosting provider
Uptime for server
backup of server
On the other hand as per your query Digital ocean has facility of auto backup of instance , snapshots , cdn facility , instant deployment and account creation , ovh may take time to deliver server , auto backups , snapshot etc facility might you dont get.
on ovh you can have multiple ips upto 16 per server , digital ocean has restriction on 25 port as well for new signups accounts and additional ip restrictions are there.