terki said:
.... and it depends on spousal occupation on home country ...........
Just to clarify, spouse's occupation / experience might not be relevant at all. I know of at least four people including myself, whose spouse don't work by choice in home countries, nor had any experience, nor do they intend to work here in Canada. All of these got through easily without exception.
However, in all of these cases, the principal applicants had pretty strong profiles, NOC A jobs with 5+ years of experience in their domain and were earning very well in their home countries too. Plus another supporting factor might be that their offered salaries in Canada were good enough to support families too.
So it is not a single factor, but your over all profile.
Also, in many countries, the ratio of rejection for TRV's is far higher compared to SOWP, mainly because the intent of trv is frequently taken to be not genuine i.e. people try to say "single entry for a month's visit and bla bla" where as if your spouse is living in Canada on study or wp, most likely you intend to live with him / her as long as he intends and is authorized to. So in my opinion, SOWP is always the better choice since it also gives CIC a better view of the applicant's profile / education / employment if any etc.