This comparison is for 2 of the best WordPress hosting services available today, but they are entirely different. The main difference is the control panel that you use to configure your hosting and having dedicated resources. Siteground uses cPanel where Cloudways has its own custom build control panel. So the benefit of cPanel with Siteground is that you can have email accounts on the service, a file manager, DNS management and much more. But the downside is that cPanel 100% slows your hosting down, it's just a fact. This is where Cloudways shines because you get dedicated resources with an easy to use control panel that is not cPanel. But with that, you don't get some conveniences like hosting email, a file manager, DNS manager, etc. Siteground and all other WordPress shared hosting will never be as fast as Cloudways. With regards to support, Siteground wins in that department, they have exceptional support. Cloudways support is good, but not exceptional. So it all really depends on your priorities and what matters most to you.