When assessing the two solutions, reviewers found WHM easier to use, set up, and administer. Reviewers also preferred doing business with WHM overall.
I have used JustHost.com for about 10 sites now & it works great each time I have used it. Their setup time is very quick & their support is pretty decent (although see the dislikes below). They have some very good packaged tools for installing applications...
WHM is the easiest and best solution for managing a web server with multiple websites and accounts. It is the admin side of cPanel and allows you to manage cPanel accounts with ease. It also allows powerful 3rd party plugins such as JetBackupManager.
The service goes down a decent amount. I don't like being on such large shared servers.
What I dislike is that it blocks everything you would do form the terminal. I can’t do my job anymore because cOanel and WHM are in control!