I love the P08. Can’t compare it to the A4 since I never used that.
The P08 has a very 80s sound, kinda cheesy at times. That is what I’m looking for in an analogue poly synth. The sound is very distinct. I love that specific sound but some people here really don’t. So I guess you should try it out first. It’s the one synth that stayed with me over the years.

The Ambika is kinda new - just a few months - and it can come pretty close to the P08 in some areas. That’s why I was thinking about an P12 upgrade. If there would be a desktop version of the P12, I’d probably go for it as I don’t need the keyboard. But I’m in no hurry.