Thanks for the comparison.
The thing I like about the Krill is the AA batteries.

I can get the Alkaline A23 batteries no prob, but I dont think I will bother trying to get Lithium in this country (yet)

I've been looking on eBay, and freight costs are usually the killer because most are listed in the US.
I paid $38 each plus $4 frieght (Australian Dollars)
To import one from the US from eBay works out to $45 ish US Dollars including frieght, which means it will be nearly $60 Australian.

Another thing I discovered is the battery fits in my Surefire spares carrier. I think the carrier is the SC1. I use the Surefire E1e and the KL1 LED conv. head. So I dont use the globe holder in the centre of the carrier. The A23 fits neatly into this space.

I think I will giveup on the Krills and just stick with these.