What is the difference between BBL and the mommy makeover?

Hello and thank you for your question.   The best advice you can receive is from an in-person consultation. A mommy makeover consists of a tummy tuck and a breast lift with or without an implant.   This can be done
through a low and short incision, all completely below the bikini line.  The belly button can be designed to look
natural and have no scars on the exterior. 
Your muscles can also be plicated resulting in a flat abdomen.  A breast lift/implant can be performed at the same
time for improved shape and contour of your breasts.  A BBL consists of waistline shaping liposuction with injection of fat into the buttocks.  Make sure you specifically
look at before and after pictures of real patients who have had this
surgery performed by your surgeon and evaluate their results.  The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

The difference between a mommy makeover and a BBL is that a mommy makeover includes a combination of procedures (usually breast enhancement, tummy tuck and/or liposuction), while a BBL is just the single buttock lift procedure. They address different parts of the body, so it really all depends on what you are looking to improve. Good luck!

A BBL can be part of a mommy makeover. Every patient is different. Some need a tummy tuck, some may want a breast augmentation or lift.

A mommy makeover can be used to describe many surgical procedures. Typically it for mothers who have had one or more children. After that they can have some sagging (ptosis) of their breasts due to breast feeding and stretching of their abdominal skin and underlying muscles. 
A "mommy makeover" traditionally addressed both the breast and tummy regions. The breasts are addressed with either a breast lift to lift the nipple to a more youthful position plus/minus a breast implant if more fullness is needed in the breasts. The tummy is addressed with usually a tummy tuck to get rid of the extra skin and tightening of the underling muscle plus/minus liposuction. 
A BBL (brazilian butt lift) main goal is to increase the size and fullness of the buttock region. This is done with liposuction of other areas of the body and then transferring the fat to the buttock. It won't address the breasts or the loose tummy skin. 
Hope this helps answer your question
Surjit S. Rai, MD (Dallas Plastic Surgeon)

A BBL is a procedure to use liposuctioned (and processed fat) to the buttock area to improve volume/size and shape
A mommy makeover tends to be a procedure to address abdominal laxity (through a mini or full abdominoplasty), possible liposuction and breast surgery (lift/augmentation or both).
Hope this answers your question!