Short answer is I don't know, of course - files can be different for reasons unknown to us. I doubt that such differences have much legal meaning, unfortunately, at least in terms of you potentially challenging - but feel free to explore with a lawyer.You still couldn't answer why they were able to approve other cases like mine without requiring those applicants to document why they couldn't find an eligible guarantor. Someone in this thread itself was approved without a guarantor and they had been in Canada for slightly longer than me.
*I mean I doubt they have much legal meaning because no actual facts or details, and I don't think there's remotely enough that can be gleaned from them to demonstrate ... well, whatever it is you seem to think would strengthen your case, like some claim of .. well, I don't get your legal theory here. So best to discuss with a lawyer.
I'll be interested to hear what a lawyer says.