John,
The comparison is a bit chalk and cheese.
Although from about the same period - the 150 was 1963, the 230 1965, the 150 was a cross over model as far as construction went - it has a separate chassis that the suspension, engine and gear box was mounted to, yet the body was a complete welded unit - if I remember the front guards were welded on. The body could be separated from the chassis as a complete unit (as I did when I restored ours) Suspension was rudimentary -solid axle at the back with leaf springs and very basic independent suspension at the front - Its heart was that iconic Jag motor - twin OHC with 2 or 3 SU carbies very impressive with the alloy covers polished. Compare that to the Pagoda, unitary body construction, independent suspension front and rear and a level of engineering sophistication that was way ahead of the Jag.
The Jag was a bit of a tank to drive - very heavy at the front (PS wasn`t an option) with a truck like Moss gearbox that required a lot of double declutching esp down changes - I don`t think there was syncro on first.... so.....not so good around town but loped along the highway and very quiet - esp with electric overdrive on 3rd and 4th - technically it had a 6 speed box if you could flick the dash mounted overdrive switch fast enough.
The Pagoda is more comfortable and roomy. The Jags seats were virtually on the floor so your legs were nearly parallel to the floor and the seats weren`t as comfortable and air-con was achieved by opening outside vents in the footwells on each side (it took the Poms until later that century to realise that their cars were sold in countries where the sun actually made an appearance on more that 3 days per year
. The heater was ferocious though!
So all in all the Pagoda gets my vote. That's not to say that I wouldn`t like another, but not if it meant selling the Pagoda