Generic NOT the same. Help

[Helpusall]

Me: Perfect hairline-just diffuse crown thinning
May 2017 obtain 1 month Brand name Propecia
-Full blown side effects even with 1/4 tablet a day.
-Can feel the stuff working: Brain fog, follicle tingles
Switch over the Generic - June 2017
No more symptoms hair fall is consistent and thinning has barely improved

I'm growing suspicious after almost 7 months on 1mg generic vs the 2 months on 1/4mg to 1/2mg Brand name Propcia
The tablets are same in shape but different in consistency.

Brand Name propecia (when split) displays a glassy-white internal appearance while the generic is obviously a pressed powder.

My Rx is at Healthwarehouse.com and they charge:
100ct Generic - $18.00
100ct Propecia - $340.00

HELP...