485LM Battery - Liftmaster OEM part vs Mighty Max - is there a difference?

Anyone know what if any difference there is between these batteries other than cost and name?

I have a Liftmaster 8550WLB-267 garage door opener and need to get a new battery for it.

The Liftmaster OEM part is $60. The Mighty Max is $20.

I figure that since both Home Depot and Lowes sells Mighty Max, that it should be just fine to use instead of the official part. I have no desire to spend more than needed. However, if there is a reason to get the official part, as there sometimes is, I would like to know.