It looks close but can't tell for sure unless I look at your setup. My buttons consist of three objects grouped together: the text, the icon and a rectangle shape. The hover is on the rectangle shape. I created the shape on the base slide and then made a copy of it. On the copied version, I changed the colour and added an entrance and exit animation. The entrance is a shape animation set to circle and the direction is set to in. The exit is also a circle animation set to out.
I then copied (but did not paste) the animation rectangle. Next, I went to the original rectangle and edited the states. I added a hover state and pasted the copied animated rectangle over top of the rectangle in the hover state. I saved the states and then grouped the rectangle, text and icon together.