Well for me if you are going to choose only one then why not to choose both? If you are going to know their both advantages it is better that you are going to make them a habit. Because as you are saving you are going to have your own idea with investment and that is going to help you grow your money and you are going to save a lot more.
Yes it would be better if you do both the saving and investing. It would help you to manage your money more efficiently. But some financial adviser said that you could actually start to invest without a savings. I do not know but it sounds good but hard to do as I have this mentality that I needed to save first to have something when I needed it.