If Its About Fastest....B16B Is...!
If Its About How Widely Usable Both Are....
Answer Is 4AGE...!!
Not To Forget The RWD Mounting Option Of 4AGE In Almost Every JDM Brand....!!
B16B Is Factory Limited Spec Motor Unlike 20v BT Which Came Across Is Almost All Toyota Sport Sedans Which Lies In Same Displacement Category In Mid To Late 90's...!
Talking Honestly....If You Compare The Local Price Of Both Motors...The Power To Spending Ratio Is Also In Favor Of 4AGE......
Surely B16B Is Faster But You Need A Handsome Amount Of Money To Source It Out And Buy It....!! 4AGE Is Yet So Easily Available Performance Motor In Decent Price 
And If You Compare That......Honda's Ain't That Cheap....!!!
If Its Me....I Won't Change My Option Still After 5 Years Of Being A 4AGE Owner... !! 
I Can't Simply Afford A Expensive HONDA