If you just need functionality IPB offers, then use IPB; if the features are available as add-ons on XF, and you can afford it, XF is still generally better.
you supported exactly what i said and you even emphasized it with your you can afford it comment.
you can not say one is $xxx but indicate the other is cheaper.
the cheaper xenforo offering does not have what the more expensive ipb offering does.
apples and oranges so to say one costs a high number and indicate that the other is cheaper is not a fair comparison.
you took off on a tangent that was not being addressed about quality of what the program offers compared to outside programmers offering.
when you start looking at plug ins to give the same ability, the prices are nearer the same. there is no blog built into xenforo or available from them. there is no pages equivalent built in or available from xenforo.
i have had no first hand experience using ipb but know someone who did use 4.3 and they were fairly happy with the program but did state that xenforo had better plug ins to do what he wanted from xenaddons.
but those plug ins cost more than the time he invested in making a basic offering in pages.
no reference was made to quality of an outside plug in compared to what is built in.
with either program you want more you pay more.
all software offer basic offerings that outside plug ins can do better or improve upon.
ipb just bundles all of their stuff together and xenforo allows you to piece meal it.
xenforo is no different than ipb or any other script when it comes down to if you special ability you will need to pay more for it.
just look at how many plug ins are advertised to extend what is offered in basic program in xenforo.
my friend talked me out of spending the money in ipb.
anyone looking at them need to know what they want to do first.