As compared to a Arc LS low dome (1 W Luxeon) The overall throw of the SL 4AA and the LS were about the same distance. BUT, the 4AA has MUCH better side spill, so the 4AA is probably putting out more total light the 1W Luxeon and in some cases, the extra side spill is very very nice to have. The ARC LSH (high dome) has better side spill than the LSL, but the 4AA still blows it away for lighting up a general area.
Where the 4AA does have a short coming compared to the Arc is in regulation or the 4AA lack of it.. The 4AA starts out bright, but as the batteries are used, it gets noticably dimmer, where a regulated ARC LS stays the same for 95% of the battery life.
I still like my 4AA ALOT . Too big to EDC, but nice light for around the house/garage.
Bob