There are a lot of difference that one can have between Catalina and Mojave Mac OS. You are not restricted to use either of the Mac OS in place of the other since the difference is not that much. The above reason makes it possible for one to either install Catalina or Mojave if either is running. With the use of Mojave Mac OS, you can have support for older Mac pro models. You cannot use metal cables to help more former Mac pro model in Catalina. After the upgrade of the software that has a 32 bit processor, you cannot use in Catalina, since it does not support 32 bit programs. Developers were asked to do some upgrade on Mojave since it was the last Mac OS with 32 bit architecture. To compare macOS Mojave VS Catalina in details, click https://setapp.com/lifestyle/macos-catalina-vs-mojave review. The fact that Catalina uses 64-bits architecture makes it be the best thing about having one. One of the things that you need to do despite the fact that the 32-bit operating system is out of date if to take the app that has a 32-bit to the next level.
Update to 64 bit processor is the best thing that you can do since your performance increases and your RAM can be up to 4GB as opposed to 32bit processor. Before moving to Catalina, there are some of the things that you need to do first. Confirming if the Mac OS has a 32 bit application is the first thing that you need to put into consideration. The best thing that you can do is to let the past be the past. You should look for any available options on updates of the apps that have 32 bit, but you still want to use them.
With the use of Mojave, you get to have a better works flow due to the availability of dark mode that adjusts the display of the desktop. Also, you get to have a better file management system in Mojave Mac OS with the help of stacks. The experience with Catalina is even better than Mojave since you have a healthy Mac life balance due to the expanding of the workspace. Learn more from https://en.wikipedia.org/wiki/MacOS_Mojave.