You must have a small garage?
If you picture that radius as a complete circle I would guestimate the center at around 600 MM, (about 24").
Either way will work but with a radius jig like Tony's you can make the cut in several passes.
With a pattern bit you need a thick template for the bearing to ride on or you have to hog it all out in one pass.
You never say what the top is made of, one pass with some materials could get messy.