i found the FR150 handled very well, the roads we tested on where very dodgy surfaces and i thought it handled well but.... Compared to my previous PD170 it felt very underpowered (The smooth torque of a CR engine combined with the less BHP)
I did notice a slight difference between the handling of the 184 but as a daily driver i doubt you would notice it that much, The 184 engine drove more like a PD engine, it had a torque punch like a PD
Apart from that both are the same, if you get one get the Alcantara seat's