Most trucks come with a wider front than rear, but some like the T100 are just the opposite. It doesn't make any difference except for personal preference on the street. Some would argue that wider front is better on the trail because if you can fit the front through, then the rear will go too. Still just personal preference though...

'97 4Runner, '06 F350, '86 4Runner, '05 WR450
http://home.4x4wire.com/erik