You are not going to lift 1500 kg with either a 130 or a b3! 1250 kg is a massive lift with low fuel and a very skilled long line guy (that doesn't stir the disk). Take the door off and looking down in the 130 is viable as the seat is close to the rail. Fennestron has big pedal movements and has a slow response...so it does add a level of challenge or sloppiness at the end of a 75 meter line while putting the bolts in the tower.
If talking a true longline machine...350 if choosing between the 2.