My C8 review is here
The reflector is exactly the same on the C8 and the C12.
Naturally, I like legoing flashlights, so I tried to swap the switches of the C12 and the C8 around, but they are a bit different, the C12’s switch retaining ring screws down a lot more than the C8’s. Using a C12 switch on the C8 tail did not really work for me, because the spring on the C12 puts a lot more pressure on the copper plunger. Also, the C12’s tail works fine on the C8. It is just a little tight, because of the extra length of the plunger. If you are using 18700 batteries on the C8 with the C12 tail, you might want to partially screw the tail on. But the threads seems to be the same.
I did not know that lightmalls did not have free shipping to some countries, on their website it says: “All shipping, free”. Is it paid shipping for a registered article?