Reason Behind '64.5 To '65 4spd Shifter Change?

Anyone out there know the reasoning for the shifter "arc" change between the 1964 1/2 shift lever and the 1965 shift lever? My pops has a '64.5 vert with a 4spd and I a 1966 coupe with a 3spd, soon to be a '66 T1o 4spd (it's sitting on my bedroom floor at the moment...) I have everything except for a reverse light switch and the shift lever. problem is I like the tighter curve of the early shifter. (I currently have what I think is an early '64 3spd lever and smaller knob on my '66) I've been trying to think of a reason why it got redesigned, anybody have an answer to put my brain to rest? Also if anyone has a line on a Ford T10 reverse light switch I'm in need!

I was told the T10 switch mounts to the shifter and the toploader switch to the transmission. Same switch, different mounting possibly? If so CJ Pony Parts here I come (yet again) anyone know for sure? I was told by an older gentlemen at work that his guess on the reason for the change is to clear the center console?

Thank you very much! I see how that works now, I was very confused that's why the switch was saved for last.