Ok.

So after reading on the gears I know I need to buy the Ford Racing and not the Motive gears.

It is my understanding that the Ford Racing gears are this part number:
M-4209-G410A

Is this correct?

So what part number are the motives? I heard they are the same but end with a M instead of A. Correct?

Also... I am wanting to buy them from Brenspeed and these are what I found there...

http://www.brenspeed.com/m4209f410.html

and these:
http://www.brenspeed.com/f888410.html


Ok if the second ones are the motives... why isn't the part number the same except ending with a M instead of A?
And why don't the first ones on their site end with A?

How am I supposed to know which ones are the correct ones to get?

 

Because the "A" is a new part number added to the end of the original, FRPP updated construction techniques on their gear within the last couple years I assume Brenspeed just hasn't updated their catalog to reflect. I also assume they use their own specific part number on the Motive gears as to not cause confusion.