Thats an easy one. The US compares to the SF M3T. IMHO, the M3T edges out the US but not by a big factor. There was a thread within the last month where four torches were compared. I "think" brightnorm did it. Look it up, it's very good.
I have the E2e and it's a great little light but I'm ordering a G2Z today for rough-neck use.