Research Paper
Overall, I think the most helpful comment has been that of SpaceTiger, that you should think of it in a more scientific way. Also, someone had posted previously, that you might just want to say what each did.
There is no valid way to compare two scientists, and that might be part of your thesis.
Each had different information available to him at the time and regardless of whether or not one or the other was a prick or a loner or whatever, they both did a lot for the foundations of science and mathematics.
Take Newtons accomplishments with Calculus and Einstein's with relativity theory. Realize that you might have to dig a lot to find substantial information to back up your points.
One question that comes to mind is, what's the rush? When is this DUE? I figure, within the week or so and that doesn't give you enough time to read a lot of information.
I'd reference books rather than webpages, go to the library and search for the Dictionary of Scientific Biography and start from there.
The University of St. Andrews also has some great biographical information about mathematicians (from the point of view of math, Newton did more... but Einstein couldn't have invented Calculus the way Newton did, because Newton came first).
Also, I realized (after a quick scan through the St. Andrews Einstein biography) that the American Institute of Physics has a few pages dedicated to Einstein. You might find something similar for Newton somewhere.
Good luck.
- Vanes.