Can't speak to the AB solution, but I've recently invested significant coin in the other system. I've got a Trimble Nomad 900L, FFS Delta V, Kestrel 4500NV BT, Vectronix PLRF 10C, Vectronix SEV-78 trigger data cable, APO Electro Optic Rail Mount, and an APO TACT-3S tripod kit. All told, I've got about $10,000 tied up in this gear. That's the down side.
The upside is that once you get through the learning curve, this stuff works great. I can setup at a FFP and build a range card simply by lasing my targets. The program gives me solutions for each target and updates with current weather. I can save target groups and FFPs. The features are endless, but you do have to invest time to learn them. The developer, Blaine Fields, tells you that right up front. I've called him many times with questions and he's always been very helpful in explaining things. It's definitely not for everyone, but you'll never need to upgrade from this system.
I will say that from what I've read, the AB solution requires a PC to upload some of the data. Everything can be put in to FFS from the device. Also, the screen is larger and the battery life appears to be longer. The Nomad also has a built-in GPS which the AB does not. The Nomad also comes with a mapping program that allows you to do map recons of your AO.
I agree with Matt that believing the LRF manufacturer's marketing hype can bite you. I started with a Bushnell Yardage Pro 800, went to the TruPulse 360R, Vectronix Terrapin, and finally the Vectronix 10C. Only the Vectronix units actually delivered on the stated capabilities. My dream LRF is a Vector 23, but I'll have to sell a kidney on eBay before that'll happen.
I think a happy medium would be a Nomad 900L, FFS Delta V, Kestrel 4500NV BT, and a Terrapin. You give up the LRF data interface, but entering the ranges manually isn't a huge deal. You also don't get the compass or inclination information. But, the feature set will be far beyond what the AB solution appears to offer. But then that's to be expected. There's only so much functionality that you can cram into one device. It's like a one man band whereas the Nomad/FFS solution is like Metallica. But then again, I'm biased. Hopefully you find something of value in this rant.
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