Low resistance on ego batteries can be lethal to your batteries so just a headsup about that. The MOSFET switches in proprietary batteries like the ego's can't handle the voltage pull and heat the low resistance requires. Yes, they will work but they will kill your batteries quicker than their normal lifespan.
If you don't mind having to replace your batteries sooner than expected, use 1.5ohms. If you don't want the expense of battery replacement, use the higher ohm'd cartos.