What if Schumacher had gone to Williams in 1996 instead of Ferrari?

Historical context

In 1996 Schumacher chose Ferrari, a long and difficult project, over a Williams that was the fastest car on the grid. Damon Hill won the title with the FW18. Had the Kaiser signed for Williams instead of Maranello, 1996 would have been a walk for him and his legend might have been even greater.