Neither, IMO!
I was recommended an Osteo clinic in my area that would help with SPD, and one that wouldn't suggest weaning my child to see a reduction in relaxin.
I went onto the ABA forum and posed the question about whether I take the physio's advice about just putting up with it (grrr) or if I'm right and that there is another angle I could pursue. An osteo responded who pointed me to the clinic nearest me that she could recommend by reputation. I've not looked back and I now have ways to mitigate SPD for my next pregnancy so that I don't have to put up with that 'sledgehammer in my pelvis' feeling!
Physio only ended up causing bruising and ongoing pain and I believe an Osteo to be more holistic and useful to me than a chiro. Just my experience and opinion
ETA: Falguni - ha, same response! I was composing while you posted yours
There's also a thing called the 'Natural Therapy' pages that lists Osteos, massage therapists etc. Google it and have a read of the descriptions in the listings. Also, Skype directory for recommendations.
Just don't take 'it goes with the territory' as an answer to back and general body pain in pregnancy and post-birth!