Si A/C mounting brackets needed to swap into EX

he said that the Si compressor is different than the EX compressor (one is denso and one is sandenz) they said that new lines were needed cause they have different connections......i asked them if the AC bracket of the SI would do the job and they said they need: Si compressor(since its different kind than the EX), new lines (for new compressor since the connections for the lines are different), and freon. They said they thought about just using the bracket but they knew that wouldnt work...........i asked him why honda only 2 yrs. ago decided to put a totally different compressor and lines for AC in the Si...and he said he didnt know only that it is a totally different engine than the EX.