Tie fighter vs X-Wing in solar winds

Given that space is full of energy and particles, i guess akin to waves in an ocean: would it be better to have a craft shaped like a boat/plane (ie. x-wing) or a equilateral sphere (ie. a TIE)? or perhaps at different times?

Note, i did search on the subject and could only find game geek knowledge. I'm trying to ask a legitimate science question.

OT: http://en.wikipedia.org/wiki/Solar_wind