I can only comment from the Canadian perspective of CA vs CFA judged not on worth but on difficulty to obtain. Firstly, it is stupid to judge a tests difficulty by the pass rate. This may sound like an illogical thing to say but realize this, in Canada in order to even write the UFE, uniform Finam Exam, to become a CA you need to have a 4 year undergrad with the specific required courses and a minimum average of B. On top of that you cannot sit the test unless you are working for an approved firm such as a Big 4 or a local smaller shop. Even then the pass rate is pretty low and if you fail more than 3 times you can never write it again. As anyone with a degree or in their last year of a degree with like $1000 bucks can write the CFA level 1, the pass rates will obviously be different and have no reflection on the calibre of students.
I cannot speak for the CPA as U.S gaap is more rule based and entails a lot more memorization and there are many,many,many more CPA’s than CA’s but from my perspective the Canadian CA designation is harder to get than CFA. Having said that, there is no point in comparing them as they are two very different things and the accounting designation covers vastly different subjects. The only cfa like component of the CA designation consists of the required finance and economic courses and in some places fsa.