Flight time works both ways. It is not an option to log it or not. You are either performing the duty and hence are required to log it or not performing a duty and hence there is nothing to log.
Suggestions such as 'a few hours as co-pilot in... aren't worth logging' are unhelpful as there is nothing in the act or orders to allows you not to log time because it wont look good on a CV.
As far as how the hours stack up. If you are trying to get a licence you need to meet the hours requirements. ).1 hours short is close but still stops you getting the licence. If you do not log hours you are entitled to you are seeing yourself off. There are plenty of arguments about the quality of different types of hours sometimes it works for you and some times it works against you.
If you believe that the duty you are performing meets the definition of co-pilot time then log it but be prepared to defend your position if challenged.