They LED's are definitely brighter.
They don't appear in those photo's, as being 2-3x brighter, to me.
Some interpret the whiter color of the light, as being brighter than it is. You can see this, if you go to a store that has a display of different light bulbs, illuminated. A colder white can seem brighter, than a warm white, of the same power.
The rated lumens should be stated in the advertising for the LED's.
The lens on the end will focus the light to a finer point, which will be a brighter spot. But, the question is, how useful does that end up being. It has to be big enough, and, low enough, to be of use to the operator. If it is aimed too high, to hit the sweet spot in front of the tractor, and all it does, is light up the back wall of the garage better, that's not much help.