Re: France to Germany (working in Swiss) Tax Question
I do have the experience of living and paying taxes in Germany, but I really couldn't help you understand if you would be better or worse off, because that really depends on your individual situation. The best way for you to figure that out is to get the 2014 tax forms from France and Germany and fill them out as a comparison. I do know that there are English instructions for the German forms on EF's German sister site called Toytown.
However, if you are Canadian and do not have citizenship in an EU country, you need to be aware that your visa allowing you to live in France probably* does not allow you to live in Germany. If you wanted to move, you would have to reapply for permission to reside within Germany.
*there is one specific kind of permanent residency card in Germany which gives the bearer much of the same rights as an EU citizen with regard to where they choose to live and work. These are rare, but I assume France probably also has something similar.