Rustee, (the standard Arfcom answer) Do both.
Last year, (and planning it again this year) I planted 3 varieties.
Yukon Gold, Kenebek, and Reds.
The Yukon Gold do have a more "buttery taste, and look when you cook them. Last season they produced fewer but larger tubers.
The Kenebeks, produced smaller but more abundant potatoes per plant and
The Reds kind of split the difference. Had some bigger potatoes and had a fairly good number per plant.
I planted only 5#s of each and got about 75#s total return.
I did short rows about 15 feet long, 3 feet or so apart. when the plants got about 8 or 10 inches tall, I till down the middle and rake the dirt over the plants leaving just a few leaves above ground. That makes for more roots and therfore more taters. I fill in the middles then with leaves which keeps the weeds down and helps to keep the ground at a more constant temp and moisture level.
Hope this helps.
FWIW
MIKE