I think we need to be clear on what constitutes theology and what constitutes religious studies. There is some overlap but the fields are different. If you study theology, you are studying the religion from within the religion and from the viewpoint of a believer/experiencer. It doesn't mean that you actually have to believe (tho usually one does), but it's from that perspective. If otoh, you are studying a religion from the outside from the viewpoint of an observer, you are not studying theology but religious studies. As soon as things like history and sociology and psychology are introduced as influences on a religion, you are talking about religious studies, not theology. When you do comparisons between religions, it is often but not always religious studies, not theology.
Simplistic example of Christian theology:
God is the Father, the Son, and Holy Ghost. They are creator, redeemer, and sanctifier respectively. The Son is eternally begotten of the Father and shares the same essence of the Father (homoousios), etc...
Simplistic example of Christian religious studies:
The Christian concept of God incorporates the creator God and spirit of God (Shekhinah) from Judaism, and adds the concept of God incarnate in Jesus to form the trinity. Early Christianity was heavily influenced by Hellenistic philosophy, etc...
In terms of job availability, religious studies is a lot more practical than theology.
I'm not trying to talk anyone out of studying theology. (Personally I love it! I love both.) I just wanna make sure we all mean the same thing by the word. I get the impression some people are actually referring to religious studies.