Oh man, I'm actually really stoked that Logistics Pipes finally made its way to FTB. AE is incredibly powerful, that's for sure. But I will still use both, because AE is severely lacking in some areas, mainly item management.
I plan on setting up a laser factory with several tables making various gates and parts that otherwise would take quite some time to wait for if I were to request them from the autocrafting computer. Problem is supplying the tables with the parts I need for each product. Simply exporting the items directly from the main AE network would only serve to fill the inventory of the table with one component (Maybe two, if lucky). I'd need to set up a seperate AE network for EACH table to ensure that they only keep, say, a stack of gates in it's inventory, so that there'd be room for other resources, like chipsets. Connecting the table directly to the AE network would probably just fill the entire thing with Gates (Or indeed, use every gate in storage, leaving no gates for other tables that need them in their production line).
With LP, I can use both systems together amazingly well. Simply give LP pipes access to the main AE network, then use supplier pipes to keep a stack of each resource in every table. Simple, clean and effective.
Basically, I'll use AE for storage, automation and general autocrafting, and LP for complex operations and resource management in tandem with the main AE network. With these two together, we can finally do EVERYTHING we could possibly dream of. AE vs LP? Stuff that, I'll GLADLY take both.