Check with CFRC, they will let you know for sure. It probably depends on a number of factors, one being whether there is a short-fall for Int Offrs. It all depends on need and how bad they want you.
See what they say about the degree discipline, and if they consider one degree more related than another.
Personally, because you are getting an MA in Psyc, I wouldn‘t be surprised if CFRC tries to push you towards Pers Selection. They may also suggest you get to INT through the SECOFFR route first.
If you are doing Pysc, make sure your specialisation and MA thesis is directly related to Int (i.e. interrogation, human manipulation, artificial intelligence, behaviour modelling, etc). This will improve your marketability when you apply. Something like developmental difficulties in white-male, suburban pre-adolesence will likely not cut it!
But, you‘ll definitely have a great chance in getting in a PRes Int branch. So, that might be the best place to start, and then do a CT.