Difference between 學識 and 知識？
知识 is:


  knowledge


in general.

学识 is more like:


  scholarly/academic knowledge


You see how the emphasis is on 学, perhaps you could think of it like book smarts.

To translate your sentence, on the other hand, I’d opt for something like:


  见多识广


Which is to say that someone has seen a lot of stuff and knows lots of things.

“He is a knowledgeable person” could just simply be written: 他见多识广。.