They are the attestation papers, so what he signs when he signs on, and then his whole service record including the date he was discharged. Canadian service records can be very detailed - pages and pages long. In comparison this country's service records for soldiers in the First World War are pretty poor, even where they have survived. The Canadian records are very detailed usually giving dental records, hospital temperature charts etc. and exactly where a man was serving and when.
The Canadian archives have given you merely a flavour of each man's attestation papers by putting the first and last pages of their service record online. Neither page contains the man's service history - where the man was and when, or when they was discharged. So yes the full attestation papers would help narrow it down.
I have 14 Canadian soldiers attestation papers from the First World War. I have just counted the pages for the first soldier (Alfred)- he has 59 pages in his service record. Not all the others have quite so many pages, but just looking, it looks like some have more or about the same. The smallest number of pages I have are for two men who enlisted in 1918, James' being the least - with just 5 pages. All the rest of the men have many more pages than him.
My advice from my last email still stands - contact the Canadian archives.
May be this Frank Taylor isn't the right man, but may be he is a possibility. If you don't contact the Canadian archives you are never going to know. Only the Canadian archives can really help you narrow down the possibilities (it might need a researcher to look through all the attestation papers in the end) if this Frank Taylor is a false lead, but then you would have checked all the Frank Taylor's who served in the Canadian army, so you would know whether you have any other possibilities and who they were, plus a detailed description of them.
However it is up to you. Either put Frank to rest and forget the itching because it won't do any good and it won't get you anywhere, or contact the archives and move forward - bearing in mind the forward still might lead to a dead end, but at least then you know you have exhausted all the possible avenues of research open to you.
As yet I am not convinced your title, a shot in the dark, was spot on. I think you still have some way to go until that's really proven!
If you do contact the Canadian archives and find anything out, I'm sure we would all be pleased to hear how you got on.
Regards
Valda