What is the difference between a 1969 GTX and a 1969 Satellite?

a satellite is your lower model car with smaller engines and transmissions and rearends compared to a gtx which was top dog in the Plymouth b bodie line in 69 gtx had 440 or the awesome 426 hemi heavy duty 727 transmission or 883 4 spd and the Dana 60 rearend plus heavy duty suspension all put in a loaded interior and exterior package.