Back in what seems now like an earlier life I sold typewriters (for you kiddies that is kind of like a self contained word processor).  I sold Xerox and Swintec/Nakajima.  Xerox was hands down a better typewriter.  But you had to keep in mind the philosophy "No purchasing agent ever got fired for buying IBM"  So how is that relevant to a planter?

Like was said, when you go to trade most likely the Deere will be more valuable than the White.  There are also a lot more people with experience, modifications, tricks, and tips on Deere.  White ... well most people have seen one.

I guess I am just old fashioned, but my question is which has the better dealer support? 

But back to your original question, why should you buy a Deere?  Because it will do what you need done.  I have one.  I miss my old cyclo every time I put a bag in it or fold it or mess with plates or pressure or talc.  But when the corn comes up and every plant is just where it should be I remember why I traded.