Hatch huges, last area vs somewhere else affect odds?

I can't find this answer searching around... In the last area you have the opportunity to get that areas huge in addition to the active huges.

Does that mean there is a 2-3x chance to get one, or simply, what you could get has more variance?

I ask wondering if the last area brings greater over all odds, or if it is no different than going to the previous max area where there is only one in the pool.