Are tree pollen allergies treated differently from other allergies?

No. Generally no. If you are receiving allergy shots, it is important to have the correct tree pollen that is responsible in the shot, but otherwise the basic principles are the same. Knowing which tree pollens are responsible for your allergies can help plan desensitization (allergy shots) and might help you predict which seasons will be difficult for you.
Not really . Similar treatments--oral antihistamines, prescription nasal sprays, and allergen immunotherapy (allergy shots).