The LDF will really kill your throw. It WILL allow just about as much overall light through, but it will be in the form of a really smooth hotspot with a lot more spill. The LDF could almost be considered a flood converter.
The breakage problem has been fixed, or very nearly so, as far as I can tell. I have one of the thicker UCL's in my TL and it's been fine. I haven't dropped it on concrete yet, though . . .
Come on, you should know better than to ask a question like that . . . I would suggest that you (drum roll please)
Seriously, why not grab both of them? They're not that expensive $8, $10, something like that. For a twenty spot you can have both of them flying to your door, and then you can install whichever one is best for your current mood/use.
Charles - You can use them. The design of the Tigerlight makes the lens a little less snug than other lights, which allows it to impact the inside of the head when it encounters a shock - like hitting concrete or somthing with no give. Try pushing on the lens in a TL sometime. You'll see that it pushes in rather easily. This is because the entire lamp assembly is resting on a rubber tube, that acts like a shock absorber. Unfortunately, what's good for the LA is bad for the glass lens. If you break one, let me know.