The Sure modules are about 2.5mm shorter than the Aixiz. With the Sure modules, in the part that holds the collimating assembly the threads don't extend quite as for down as the Aixiz. Also, the opening that you press the diode into is recessed in the Aixiz modules. This is not so with the Sure. These are the only three differences that I've seen..
Here's a pic that shows the length difference:
The Sure has the sticker on it.
Obviously using a Sure with a rkcstr driver presents problems..
What I mean by recessed is in an Aixiz module, the diode gets pressed in until it is slightly recessed past the surface. In the Sure module, it only gets pressed until it is flush with the surface. The diode can't go any further. In an Aixiz module there's a slightly beveled edge around the diode opening. This is not present in a Sure module. I'd take another picture, but you'd never be able to see that kind of detail in any picture from my phone..