This has Biscotti and a few improvements like the board and lens which the product page mentions. Body styling is different - better IMO - but I doubt it actually handles heat any better because of that.

The Astrolux version has a noticeable bump in output (its got a FET installed IIRC?) and has Bistro UI.

Yeah some of the versions are more expensive but there seems to be at least one of the companies with a sale at any given time, I paid less than $20 for my Astrolux.