Hi there,

I would say that this would really depend on what type of work the application does and if it needs more CPU power or more RAM.

What I like to do in such cases is to run a load test and see how the application behaves on the two different Droplets that you’ve picked.

That way you can actually see how your specific application behaves under load and have some actual data to make the right decision.

You can go through this tutorial here on how to get started with load testing:

https://www.digitalocean.com/community/tutorials/an-introduction-to-load-testing

Hope that this helps.
Best,
Bobby