Generic Vyvanse vs Biphentin?

I had been taking Vyvanse for about 3 years when the Biphentin option came out so my doctor had me try that for a bit. It wasn't a negative experience in any way I just found that Vyvanse worked a little bit better so I went back to it.

I moved from Ontario to New Brunswick 3 and 1/2 years ago and didn't have a family doctor (still don't) and was unable to get a prescription until I was introduced to Beyond ADHD and was re-evaluated.. and have since been in touch with a prescribing therapist and got back on my Vyvanse regimen. My issue with that is the coverage I have through my health benefits with my job are that they will only cover 80% of the generic pricing so I am presently on generic Vyvanse because I can't afford the $195 out of pocket every month to get genuine Vyvanse.

I was thinking about trying to go back to the Biphentin since it IS covered through a 3rd party coverage card through the pharmacy (which was taken off of the genuine Vyvanse) coverage.

Long question short, does anyone have any experience with Biphentin in place of generic Vyvanse when genuine Vyvanse is not available? Or any other options to maybe suggest to try?

I am basically the "lack of motivation, daytime sleepiness, eating and making bad food choices out of boredom" ADHD-er.

Thanks in advance for any insight.