Yes, I think the E2 fit's in the same place I was using my D2 with a P60 lamp. It has a slightly larger (rounder) beam. I would say if the P60 was circular, this is what it would be. This also might be why it seems a bit dimmer, spreading the light over more area.
As far as the brightness compared to the Scorpion or the P60, they are all very close. I would put them in this order though, P60, Scorpion, E2. But I think most people couldn't tell the brightness difference if you flashed them one at a time at a wall, probably not even me. I could tell by beam quality, which is which. They are all very close in brightness though. Psychology the E2 seem brighter because it is so much smaller, you just don't expect that much light from such a small light.
I know this will come up so here it is. The odd thing about the E2 is it almost feels to small to hold. Some people complained about the E1 being to small to hold in the Rogers style, this might be the case for the E2. If you have really big hands it might be more of an issue, or of you just like a bigger light. I think I will soon not be able to carry a D2 after I get used to the size of the E2.
Brock