Hey longpvo,

you can see a very detailed comparison (with videos and tables) as well as explanation about the WPI Fast WordPress Stack on the page below.

https://www.superspeedyplugins.com/shop/wpi-fast-wordpress-stack/

Note that Digital Ocean are not providing support for software installed on their servers – if you’re looking for having someone on hand to support you with a setup like this, you should really consider using WP Engine instead. They provide Managed WordPress Hosting which obviously costs a bit more, but they’re the ones you commissioned this setup so if you go with them, you’ll get good performance PLUS support when you need it.