You can learn from both of them but careful from where you get advice. There are differences between mentors and adviser base on their teachings. The adviser is the one can tell you how to do it while the mentor shares to you how he did it. Always keep in mind that both of them can advise good thing but one of them are very successful of doing it.
This can help your learning process boost and gain more experience effectively as you listen to them both. You can identify problems ahead if you foresee the vision from what you learn from them. You get the perception of their experience that you might come along with. All you have to do is to learn.
Its better to be with someone who had been there! Its like having a guide that is regularly climb on the top of the mountain rather than people who just watching.