There is a History of WW2 podcast which is quite good and had covered a lot of this stuff in depth.

On no count should you use the podcast as a source in a serious history paper but it could provide a great jumping off point for you.

/r/homeworkhelp and /r/history may be better suited places for this question.

I had to remove this question because of the way it was phrased. What if questions are not permitted here. We typically refer such questions to /r/HistoricalWhatIf. However, your followup questions are totally legitimate. I would suggest reposting this thread to remove the "what if" component of the question, and specifically asking about differences between the two armies and factors that lead to the allied victory. That would also allow other posters to answer this question without writing your paper for you. :)