Why is circle 1 similar to circle 2?

Circle 1: center (2, 3) and radius 4

Circle 2: center (2, 3) and radius 12

Circle 1 and circle 2 have the same center.

Circle 2 is a dilation of circle 1 with a scale factor of 3.

Circle 1 and circle 2 are reflections of each other.

Circle 2 is a dilation of circle 1 with a scale factor of 8.