So, I got the power variant and respecced a toon before I realized there's a huge difference in energy requirements between Submachinegun Burst and the U-MD Ghosthunter Phase Rifle. Like 3 times as much energy. Both powers look like they are in the same ballpark damage-wise. I don't get why the U-MD Ghosthunter Phase Rifle's energy requirements would be sooo much higher.
I'm hoping this may be a bug, since it doesn't make sense to me. It would be great if it could be changed to more closely match the power it replaces.