They factor in a lot more then the two scores you mentioned.
That's true. In 5 of 7 benchmarks i3-350 does better @ Notebookcheck.
i3-350 scores better in SuperPI 1M, 3DMark06 CPU, Dhrystone, Whetstone, Cinebench R10 Rendering Multi core.
N620 scores better in Cinebench R10 Rendering Single core and wPrime 32. i3-350 vs N620
--> You can click on each benchmark individually and make it sort by best performance in that category.
And then there are the Passmark CPU scores too.