You have alot of views and no replies.... Probably because few people use both.
And sorry, I didnt either!
But I did use topscore and was pleased. The only thing I wish it had was explanations for the answers. But often I ended up learning more becuase I really disected the problems I missed so I could figure out what was wrong.
Read online reviews of each, then choose one.
Both will help, they wouldnt both be popular if that wasnt true.