Terms:

BCAA - Branched Chain Amino Acids
Casein - The primary protein found in cowÕs milk.
   It digests slower than whey and is good slow release of nutrients is beneficial
    (like before bed when youÕre going 7-10 hours without food).
Whey - Whey protein is a mixture of globular proteins isolated from whey,
  the liquid material created as a by-product of cheese production.

• Plant-Based Protein Supplements vs Whey (Infographic) - Pro Plant
  Research suggests that consuming 1.75-3.5 grams of leucine is a key factor when trying to maximize muscle protein synthesis. However, once this leucine level is reached, a proteinÕs ability to increase muscle protein synthesis effectively plateaus. Plant-based proteins contain about 6-8% leucine while animal-based proteins contain about 8-11% É one could achieve the same lean mass and strength improvements with either whey or rice protein, provided the dose of rice protein was high enough to provide an effective amount of leucine.
• The Pros and Cons of Protein Powders: Plant vs Whey | Dr Nibber leaning toward Whey
  Whey:
  Higher in Branched Chain Amino Acids (BCAAs) Ð These specific amino acids (leucine, isoleucine, and valine) stimulate muscle growth and maintenance.
  Better taste than some veggie proteins.
  Dairy sensitivity and allergy.
  Some studies suggest that dairy products can promote the growth of cancerous cells because of the high amounts of galactose, casein and insulin-like growth factor I (IGF-1). On the flipside, calcium from dairy has been shown to prevent colon cancer. Overall the evidence is far from confirmed and is still considered controversial.

  Plant:
  Easier to digest. So there are PROs and CONs to consuming either type of protein. The choice is up to you, but I think it comes down to personal preference and individual tolerability. If you are not dairy sensitive then a high quality whey protein can really offer some unique health benefits that are not present in veggie proteins. Otherwise you may be better off with vegetarian sources.

• How to Choose the Best Protein Powder for You - Life by Daily Burn - Neutral
  Protein drinks have been shown to help repair muscles post-strength session, and increase muscle strength and size when consumed within two hours of your workout.
• The effects of 8Êweeks of whey or rice protein supplementation on body composition and exercise performance | NIH - Neutral
  Rice protein isolate consumption post resistance exercise decreases fat-mass and increases lean body mass, skeletal muscle hypertrophy, power and strength comparable to whey protein isolate.