First of all, let’s start with registration.
Cloudways will ask you to prove your identity, you will have to send documents and wait for your registration to be validated, this takes about a day. This can be really annoying, especially if you only want to try their servers. Once validated, you will have to choose the server technology and its location and then wait for the server to be ready (it takes about 10 minutes).
WPoven is much faster, once you have registered, you just have to pay directly and the server installation is done automatically. Half an hour later, your site is ready.
Concerning the interface, the two managed hosting solutions do not offer the classic, messy and ugly CPanel. They have their own server management interface.
WPoven offers an ugly and old solution, on the other hand very easy to use and very efficient.
Cloudways offers a very optimized solution at UI/UX level but can be confusing and you can easily get lost.