The 30 lowest vibrational energy levels are calculated for the X B-3(1) and a 1A1 states of CH2 and NH2+ for various potential energy surfaces. We include a new surface for the NH2+ triplet state, with predicted fundamentals nu1 = 3059, nu2 = 845, and nu3 = 3360 (expt 3359.9) cm-1. Where possible, results are compared with vibrational levels calculated using two other methods and with experiment. At low energy, the differences between the calculated vibrational levels are due primarily to the choice of potential energy surface. Of secondary importance is the method used to calculate the vibrational energy levels. The differences resulting from the method used are most apparent for cases with a diffuse vibrational wave function or for eases where the bond distance along the minimum energy path depends strongly on the bending angle.