I tend to agree with Zalim, but based upon the weight of the theories which the two scientists developed, it will be unfair not to vote for Einstein over Newton. For normal speed of particles, the difference between Newton's laws of motion and Einstein's theory of relativity is trivial, however when we consider speed close to that of light, Einstein's formulation of relativity purely supersedes Newton's laws in terms of accuracy and completeness. Newton's laws are useful but are limited whereas Einstein's formulations are universal and fit all results till date. So f I have to, I will vote for Einstein.