What should I believe the Quran instead of any other religion?

I am coming from a Christian environment but I always followed it blindly without doing research on my own about different religions. Now I have grown up and I am doing research on these topics on my own. I tried comparing different religions and I find Judaism and Islam very similar, both have a prophet who communicated with God and wrote down holy texts (Judaism the Old Testament and Islam the Quran). I was wondering about the essential differences between the two, that makes Muslim prefer Islam over Judaism?