Ubuntu 18.10 vs macOS 10.14.3 Mojave for testing on local installation

I’d like to install OJS 3 on a spare laptop to experiment with some of the features. Available to me are systems running macOS 10.14.3 and Ubuntu 18.10. Are there any advantages or disadvantages to running the system on one platform or the other for the purposes of trying out new themes, plugins, etc…?