It looks like a prototype/mule car pattern, painted to disguise some shapes/features of the unreleased vehicle... Which is probably just what Wilson wants - making it harder to spot the long list of top pros not using what their PJs indicate. Not that it will work in the age of hi-res images
Because the thick beam provides more free power. The thin beam is more for intermediate/advanced players and Wilson knows the best selling frames can be used by everyone at every level (Pure Drive for example).