Wolfdales contain two cores and Yorkfields contain four cores and placing your email add in a post on an international forum should obtain your inbox filled with spam quite adequately.
Primary, turn off caps lock. Secondly, the only dissimilarity is the figure of cores. A yorkfield is 2 wolfdales on a single chip so in a single or dual threaded application, at the same clock speed they will perform equally. It’s only when you start running multiple applications concurrently that you will notice a difference, but for small business uses, basic office tasks I suppose, you wont obtain a presentation advantage.
I am conscious of the 2 vs. 4 cores but my attention is how they would do in a small business application. Does the 4 core chip actually have a huge disparity in presentation?
If you're operating a program that uses more than 2 cores, yes it will be a huge difference. If a program can only employ 1-2 cores, there will be essentially no dissimilarity.
Quad cores are usually better at multitasking... (i.e. running virus scans while doing other stuff).
Rather than receiving upset and shouting possibly you should have collected your question a little more obviously rather than leaving it to others to deduction what it is that you wanted to recognize.