Beg to Differ is the second studio album by American heavy metal band Prong, released in 1990 through Epic Records.

Beg to Differ was the start of Prong's change in music direction, showcasing an experimentation with thrash and speed arrangements and hardcore influences inspired by the likes of Bad Brains and Suicidal Tendencies.

Eduardo Rivadavia of AllMusic wrote, "Prong's once diffuse, post-hardcore rumble solidifies into a tightly disciplined thrash metal attack on their first major label release, Beg to Differ.

Also a more democratic affair than later efforts, the album finds guitarist Tommy Victor and bassist Mike Kirkland alternating lead vocals as well as writing credits.

And drummer Ted Parsons is equally impressive, providing a thunderous rhythmic foundation of Neil Peart-like diversity and precision.