Whey protein supplements and BCAA supplements are very different.
BCAAs are the amino acids leucine, isoleucine and valine. They are free form amino acids that don't require digestion. They are rapidly absorbed as soon as they reach the intestines. This makes them optimal to supplement with immediately before/during/after your workout. The amino acid L-leucine also directly signals protein synthesis through the mtor pathway.
Whey protein is a milk derived whole protein source. It is basically just a protein supplement to help you meet your daily dietary protein requirements. Since whey protein is a complete protein source (just like all animal protein sources) it contains all the essential amino acids. There are 8 essential amino acids and BCAAs are 3 of them. However, whey protein needs to be digested by the body in order to break the protein down into individual amino acids.
Truthfully, you dont need BCAA if you are eating a high protein diet. You will be getting plenty of BCAA from protein alone.
Buy yourself a good quality pure whey isolate like wheytobuildmuscle from n2bm.com. That's all you need. A big 5 pound bag is $40 on n2bm.com. Use that to supplement you diet to help reach your daily protein requirements.