Betelgeuse is a red supergiant with a radius that stretches more than 600 million miles, about 1,400 times the radius of the sun. That gives Betelgeuse more than one billion times the volume of our host star. If the enormous star were at the center of our solar system, it would engulf every planet and asteroid out to beyond Jupiter.
Based on the image, the only thing it has in common with our sun is that it appears to be round.
the differences in brightness almost seem to have a pattern.