on state of M, with the proviso that when X is a dianionic ligand group, p is 1; and q is 0, 1 or 2; and 2. an activating cocatalyst; with the provisos that E. the first catalyst is different from the second catalyst, and F. the weight ratio of the first catalyst to the second catalyst, based on the weight of the metal M in each catalyst, is between about 90:10 and 10:90. 3.