1, CA is easier in term of examination.
CA exams kill somebody using a gun. one bullet is done!
CGA exams looks like killing someone piece by piece by using a knife (more pains some time the knife is not so fast)
2, CA is easier in experience requirement.
CA does not require senior level experience as long as you worked in any size any CA firm over 1 year.
CGA requires senior level working experience which is hard to obtain. (employers will not offer you the senior position if you are not a CGA)
3, CA needs shorter time to complete.
CA students usually spend 3-4 years, they will be a CA.
CGA strdents average time is 7 years due to its curriculum.
4, CAs earn more than CGAs in Onatrio
CA is the dominate designation in ON, so the salary is higher.
CGAs are earning lower than CA at least in Ontario currently.