Be careful with FS comparision because it depends on the manufacturer briding plan. In other word , the original length of the Z briddles vs A B C may be different between pansh and FS = for example maybe a flat cambre requires to align knots on FS while it requires to have longuer Z on Pansh. Just an exemple, as I have not compared their briddle plan , but it is better to set it with your feeling raher than knots alignments IMO.
Overall, if you extend Z (i.e. Z connection will be more close to the kite), you will gain stability but loss agility in turns. Wind sweet spot will be in higher winds (less low end but better high end). When extending Z you may have to compensate a bit the AoA by un-trimming the kite or add equivalent extensions on rear line connection.