Generally a physio will give you exercises, a chiropractor will 'crack/pop' you and osteopath will likely do both of those (providing it's appropriate) with a lot of soft tissue/ massage and mobilisations in-between.
This question gets harder over the years of experience to answer as there is a lot of cross-over between the professions, the main thing is to understand how your practitioner works and whether this suits you. A good website should tell you this or if you can, even call and speak with someone to be sure of what you are getting.
We offer free contact calls with all our Osteopaths if you would like to discuss your case before booking. You can book online for this.