A lot of people feel that the higher spatial efficiency and longer warranty of Sunpower are generally not worth the premium price. A possible exception is where for some reason a particular number of watts is needed in a strictly limited space.
The spatial advantage as compared to LG is pretty much gone now. It amounts to a few inches on most residential roofs, and in some cases the details will mean more LG panels can fit, since they have different footprints. And the price is much better.
JoeNorm, as for your original question, most residential sticks with 60 cell modules or similar, and black frames are pretty much an expectation these days. But other than that, whatever balances the customer's price, space, and aesthetic demands.