FASS and AirDog are related... literally.. IIRC, one was the father, one the son, and then the inevitable falling out w/ family due to differences..
they are essentially the same, unless you go with the FASS Platinum mono filter set up..
I run two air dog 150's on my rig.. one is as a standard lift pump, mounted on the frame rail, and the other I use to transfer fuel from a bed mounted axillary tank to the main tank, and as something of a back-up if the primary one fails.... it's not necessary, but it's how my brain works..
at any rate, I wouldn't pay anyone to install- it is pretty straight forward, though a little time consuming to do it right- mostly with routing wiring harness properly, and getting the hoses set good...
here are two tips, fwiw:
you DO NOT HAVE TO DROP THE TANK.. you can lay under the truck situated just behind the axle, and with your head to the passenger side of the fuel tank.. take yer' phone, reach up to above the tank with it, and snap a picture of the top of the basket.... get a look at it... reach back up there and disconnect the quick releases you need to disconnect, and simply lay them to the side.. then run your feed line back there, reassume the position, and snap the feed on the feed straw... you DO NOT need to use the airdog/fass supplied straw, as the factory one is capable enough, and it sits in the lowest place in the tank...
tip two: if YOU DO DROP THE TANK, don't even bother with the basket... get a sump and install it.. pumps are made to push, not pull.. if you allow the pump to be gravity fed instead of having to pull fuel to it, you will have a happier pump for a longer time...... plus, installing a sump ridded my truck of something that had been plaguing it since I owned it: what I always thought was turbo lag isn't, it's a pause in pressure as the valve redirects to the engine instead of back to the tank.