Fallout 2's was WAY easier to get. All you have to do is pretty much literally walk into a base and get the vertibird plans, which is easy peasy, and then let the BoS copy them, it's so easy to do. Also, theres only 2 suits of T-51b in Fallout 3.
With Fallout 2 it's only "easy" if you know where the armour is in the first place. I keep reading these comments that its so easy to get PA in FO2. I have tried many times to just walk to
Spoiler Navarro to get the Advanced PA in the locker
while still at an early level. More often then not I run into swarms of Wanamingo, floaters and raiders. Again it's only easy if you know it's there. On your first play you would not know that unless you spoil it for yourself.
Fallout 3's PA svcks anyways because it does not have damage threshold. It was only hard because you had to go to the BoS and get them to teach you. Going to the BoS is only when you start the final quest. Alot of work for pointless armour IMO. Then O:A makes it easer to get the poinless armour.
Anyways more on topic, I sure hope there are quests the BoS will send you on to get their help. I also hope the BoS aren't the only ones to have PA.