The difference in diameter between the pole and the equator is only about 26 miles.

7926 miles vs 7900 miles

So a difference of about 0.03%

Yeah I'd say that's pretty spherical

Edit: Rereading this it comes of a bit rougher than I intended. Basically what I'm saying is something can be spherical without being a perfect sphere, infact if to be a sphere (in common usage of the word) only applied to perfect examples of a sphere than nothing would be a sphere. Definitions are pretty wishy-washy a lot of the times, especially when it comes to describing the world as it is.

Earth is an oblique spheroid, technically. But calling it a sphere is true enough to observers that I'd say it still counts.