I have the Leica 1600 (less than 6 months old) and a shooting buddy has an older and presumably less expensive Bushnell. Not sure of his model nor of the distance "rating" though I'm sure it is less than the Leica.
The most obvious difference in performance is is consistancy. While within both units respective ranges, the Bushnell is almost always 2 or 3 yards longer on its return. For example, I'll range something at 375 y and he'll get 377 y. When the range is over 600 or so yards the older unit is almost worthless because of inconsistancy.
When we're under 600, ranging the same target with the Bushnell several times will ocassionally return several different numbers, sometimes as varied as 40 or 50 yards. At the same time, the leica will return exactly the same number. Of course with both units, one must hold them steady.
An example of the Leica's accuracy might be shown from my experience with it this past Saturday. I ranged a target at 524 yards from the point we were shooting from, put the dope on the rifle and fired several rounds on target. A few minutes later I stepped back a few feet to the tailgate of the truck to write my notes where I ranged again - 526y.
Another example, I just stepped out the door here and ranged a building that is 1017 yards away. I took 3 steps closer and the range returned changed to 1014 Y. There is another building out there that ranges at 2152 yards and is not squarely facing me. I must take 8 or 10 steps to get a consistantly shorter return of about 2140. 3 things to note, 1) the side of a steel buildings give a great return for the laser and 2) the 2100 yard building is considerably over the units rating and 3) a game animal will not return as well as a building particularly at longer distances.
I'm not familiar with the Bushnell fusion model but I'm quite satisfied with the Leica 1600.
my .02, - hope it helps.
