Interesting string, especially since this year will be my first hunting boar, so anything I have on these critters is purely anecdotal. I do plan on using my 45-70 "Buffalo" rifle, so it should more than do the trick.
Seems the reputation for boar runs the whole gambit, from them being elusively shy to downright terrifyingly aggressive. I do know that on guided hunts your guide carries a high powered rifle, just in case the situation goes FUBAR. However, it tends to put you on notice when more than a few old timers will tell you they'd rather face a bear situation than face a ****** off (or worse, wounded) boar. But then, I know few fellow hunters that would rather face either than deal with a ****** off Mrs.
Perhaps this is one of those things where you ( I ) just have to see for yourself?