It really depends on where you want to go with your breeding projects.

The advantage of the super is that you know every single one of its offspring will be pastels. This will make it easier to hit combos.

The advantage of the pastave is being one step closer triple gene combo, however, the chance of hitting them is much smaller than hitting a double gene combo using the super pastel.

If you don't have a strong leaning, cycle both males through her and maybe you'll get lucky and get both!