I like to keep things symmetrical and consistent for the whole table, but I also want to use the existing grain pattern where I can. So, I use a piece of glass and trace the grain curve and check it against all 4 cuts (two outside per leg) and take a sort of average or check where it will fall.
Once happy, I trace that onto a piece of 1/2″ or 1/4″ MDF to make a template. First, rough it out on the bandsaw, staying just outside of the line.
I use a spindle sander to cut right up to the line.
The sander leaves “divets” all along the edge. I go back and clean those up with either some rasps first or skip straight to a flexible sanding pad.
I’ll use this same template to make all 4 cuts. The top and bottom edge are kept square so I can use them for reference edges.