BTW the other week I was inside a silty wreck (The Radiation) and I took the time to put the Heser and the 3C Rat next to each other. I *really* liked the beam on the 3C Rat it has a tightly defined central light column which penetrates well and then a neat cone which flares out a few degrees around the central column. This lower intensity cone area is ideal for reading gauges up close whilst the central column makes it a decent tool for signaling.
The Heser by comparison is a more uniform light column. It projects fractionally further and the beam is whiter. As a pure signaling device the Heser just has the edge.
I didn't have the Jnr Rat on me at the time as a sub-30m wreck didn't really require 3 back/up lights
If I was stuck deep inside a wreck without a primary light and I was relying on a back/up to get me out then I think I'd reach for the 3C Rat first because the extended area of close range illumination is likely to be more useful than the marginal increase in range that the Heser offers.
When I lost my primary light scootering around a different wreck I reached for the Heser as I had enough ambient light to read my gauges and I needed the distance to stay in light contact with the guy I was scootering with (with limited success as it happens).
Both the Heser and the 3C Rat are great lights but with slightly different beam characteristics and therefore could be better suited to different environments. Take one of each...