No real large perfomance differences, only large price differences. You are safe with a Kangaroo set.

One hint, always cheack the real head clearance. Just mount the buttonhead with some spacers on the screws (no head) and use a piece of solder in a L-shape through the plug hole and rotate the crankshaft so the solder will be squeezed between head and piston. The flat spot on the solder presents the real head clearance and must be 0.6~0.7mm