I've done a bit of flying for Phoenix, and I know some people at Elite, but I've never done any training at either. Elite are the more established of the two outfits, but that isn't necessarily the most important criterion.
Go along and see them both and see which you feel more comfortable with. If you're thinking about the CPL, you need at least one eye towards future employment. No-one can guarantee you a job but it should be a major topic of conversation as to what opportunities they see and where their graduates are now working.
HTH