Ive found they grow at a similar rate and deer clearly have different preferences in different areas. A couple years ago I planted 4 test strips all 12' feet wide and 200' Long. I planted Cereal Rye, Bob Oats, Winter Wheat, and Triticale at the same rate and around Labor Day. I had cameras on these plots for a couple months. The Oats were without doubt the most favored, 2nd was the CR, 3rd was the Triticale, and last was the WW. They crushed the oats and rye to bare dirt before they even touched the wheat or triticale. It was an eye opening experiment for me. Ive only planted Oats and WR since then and had great success. I mix and try other things that work great too but you really do need to find what the animals you have there prefer.