I have seen it and its a good explanation of how the lifting numbers differ between the loaders. But it is not a well designed real world test in terms of the 2000# lifting capacity I threw out:
- The measurements are nowhere close to ground level height
- The test rig is not measuring at the pins but well forward of them.
- It neglects the weight of the bucket.
Here is a better conceived and executed test of actual lifting capacity.
Video is quite long so here are the Cliff Notes:
- Test was conducted using an L2501 which has 150 PSI lower hydraulic pressure than a L3901.
- Load was measured at the pins and 20" above ground level.
- Measured loads also neglect to adjust for the weight of the rigging which is probably 100# or more.
Notice that when he bumped the pressure by 360 PSI (210 PSI higher than a stock L3901) he measured a bit over 2000# @ 20" height. I think these numbers are very indicative of 2000# or more at the pins and ground level with a dead stock L3901.
Getting back to the original question of choices and tradeoffs. Obviously a heavier grapple reduces your payload so you have to take that into account. But be sure to compare apples to apples. A EA 60 inch twin lid root grapple is rated for a 35-55 HP tractor and weighs 430#. The MTL RG-7 grapple is rated for up to 60HP machines and weighs 90 pounds more. It also costs $1000 less with no money up front and arrives in 8-10 days instead of 8-10 months.
Dan