Crossfire & TBI distinction?

I have heard the terms used interchangeably, but what is the tech difference between F body Crossfire and TBI Iron Duke on 4 cylinder cars? Also, what kind of spec changes existed between Corvette and F body Crossfire? Thanks.

http://www.82firebird.com/images/gallery/TA/ta_0026_LG.jpg

Firebird T/A (http://er3.com/firebird/67firebirdT.htm)

http://binatani.com/wp-content/uploads/2011/06/1984-pontiac-fiero-image.jpg

Iron Duke (https://www.youtube.com/watch?v=POBIOc09U4w)

Crossfire, 2 tbi's on opposite sides of a manifold.