Lexis-Nexis v. Westlaw

I am working at this office along with going to school. My major has recently brought me to these two competing law encyclopedias. I have always dealt with LexisNexis and I do love the program. Being so easy to use, it was a must for all of my classes. Then this semester I was reintroduces to Westlaw, which is confusing me. I do not understand why students get choices because I will always go with what I am comfortable with. Lesson of my week has been easier is always better, when it comes to school work.