May I take 1, Focalin XR 30 mg and 2, Focalin IR 10 mg?

Also I’m currently taking methylphenidate 20 mg IR for treatment resistant depression and as a dopamine agonists. Does Focalin work in the same way as methylphenidate on these issues? I would like to switch to Focalin because I’ve been on methylphenidate for 8 years and need a change but I’ve also been on Adderall and it doesn’t treat my TRD or act as a dopamine agonist.