I've owned both models. An earlier 80's graphite necked Arpege and a 1990 Passion with the 90/10 neck.
The in's and outs have already been covered in this thread in a way which would put me to shame, so I'll leave it at that.
I consider them amongst the best basses money can buy.
Passive.
Went all around the active block for decades with an Alembic, Wal, ACG, Vigier, Musicman, Jaydee etc. before arriving back where I started.
Simplicity is the ultimate sophistication has become my philosophy.