Is there any difference in fresh milk and pregnancy milk?

Towards the end of her second trimester onwards, my friend started drinking Enfamama A+. Apparently, it's good for pregnancy and for future breastfeeding -- has all the important nutrients and vitamins in a milk drink. It comes in 2 flavours, vanilla and chocolate. Obviously my friend is a bigger fan of the chocolate flavour, she loves it! She also continued to drink normal pasteurized milk. I reckon the maternity milk is just a supplement, normal milk ought to be enough :)