Tunneling Spectroscopy of the Superconductor-Insulator Transition on {Bi}_{2}{Sr}_{2}{Ca}_{1 - x}{Y}_{x}{Cu}_{2}{O}_{8 + delta} and ({Bi}_{1 - y}{Pb}_{y})_{2}{Sr}_{2}{Ca}_{1 - x}{Y}_{x}{Cu}_{2}{O}_{8 + delta}