Potential models are usually fitted to phase-shifts up to 350 MeV laboratory energy. The differences between such potentials show up in (i) high-energy phase-shifts predicted by them and (ii) half-off-shell reaction matrix elements derived from them. The authors have studied both aspects up to 750 MeV for the Reid soft-core potential, the super-soft-core potential of de Tourreil, Rouben and Sprung (1975) and several separable potentials.