Yes, for me it is better because if you do it your way you have to keep your ssh connection open until all of the git clones have been done, which in this case takes several hours.

(Or you could also run your way in tmux or screen.)

With task-spooler, it puts all of the commands (in this case, the individual git clone commands for each of the repos) in a queue and it runs the commands independently of my ssh session, so I can quickly add a bunch of jobs like this to the queue and immediately disconnect my ssh session.