You can ask 3 people this questions and get 10 different answers. That being said:
1) The overall philosophy, classically speaking, is different. Chiro's are taught that manipulation ultimately targets the 'nervous system' and D.O.'s are taught that 'the rule of the artery is supreme', in other words, get tight tissues to loosen up, get the range of motion back, let the blood get in there, then leave it alone and let it heal.
2) Treatment plans tend to differ. For a really acute pt I might see them every 2 weeks, then quickly try to spread this out to q4-6 weeks. I was taught: 'find it, fix it, leave it alone'. Maintenance, if appropriate, would be like q2-3 months for a chronic. Chiros tend to treat more frequently, as often as daily, but I have seen 3x/week as typical for acute pts. They are taught this, but there are obvious financial implications. When a pt recently told me they asked their chiro if they could come in more often, and there were told no, thats not necessary, that chiros stock went up quite a bit for me.
3) As to how much PT will be involved is dependent on the D.O.'s training and specialty. Chiros may give stretches>exercises but referring to a PT is kind of referring to the competition. Again, very providor dependent on both sides of the aisle.
4) Types of techniques: in general chiros tend to do more of the 'wham, bam, thank you m'am'
techniques. These are what most people think of as 'spinal manip'. These are HVLA (high velocity low amplitude). These are quick and pts feel like something is being done b/c they hear/feel things popping and usually feel different right away. A D.O. who specializes in manip is much more likely to do gentle techniques like myofascial release, muscle energy (contract/relax in the PT world), and other non-twisting/thrusting manuvers. There is a chiro technique called 'activator' which uses a hand held instrument and is very gentle. The problem with this technique is that many providers use the instrument as a 'find the sore spot and thump it' b/c this is quick and easy. This is not how it is designed to be used.
5) Indications: if I have a young, healthy, non chronic pt I anticipate seeing a chiro will help them recover from a MSK issue, especially spine, a bit quicker. Your FMS, elderly, chronic pts may prefer your local D.O. guru, if you are lucky enough to have one.
My bias: I'm a D.O. who does OMT. I did a fellowship in this specifically before doing residency/pain fellowship. It made me a better physician and gave me mind blowing palpatory skillz
, yoda has contacted me about becoming a jedi. I have multiple family members, friends, including my best friend, who are chiros. I would send pts to some of them, and not others. Chiro admission standards are too low and the used car salesman bad apples get mixed in with the real pros. To be balanced the D.O. schools are expanding too rapidly now and the profession may have a similar problem as time goes on. That being said the hoops one has to get through to be a board certified D.O. are a whole different ballgame since there really is no true 'residency' for chiros.
sleep, I hope you weren't trolling on this one, b/c if you were and I just wasted some of my sunday a.m.--I will find you and execute an ancient osteopathic technique that will make you have bowel incontinence everytime to do a cervical injection, if that does not occur already.