BTW, why this little light over the Photon light? That style is great on a keychain or in a kit. What's the advantage of the new light?
Size and weight are not much different. Doug has said that he liked the twist on-off because it's less likely that the lite could be turned on accidently and drain the battery. I also think the Pico will be more rugged because of the metal construction and since it is gasketed will likely be more water resistant. Can't comment on the relative brightness of the two.