My opinion with experience (I gave the test on December 10th), I have seen CELPIP being more tougher due to Listening part, but others say Listening is much easier in CELPIP no sure about that, its more of a memory test rather than a Listening test.
CELPIP is easy on Reading though from what I felt. Writing is easier again though as we have a computer to type what we write and easier to make the corrections faster.
Speaking, is where I have heard everyone complains it is tough, but in my experience is how fast can you think, I felt it was ok, but I will know about it after I get my results.
I did score a consistent 8.5 on Speaking in IELTS 3 years ago on both attempts but on CELPIP , it is my first time.
I will be posting my results here to share my comparison. I just wished I had better memory ability
, then I would agree CELPIP is easier. I have no issues understanding the accent but a long conversation and not being able to make a note of it easily is my problem.