I can only find a difference in the model designation. I can't remember whether the cable to the power supply was fitted with a CH or a Euro plug. The easiest way is to quickly ask i-tec support what exactly the difference is, if there is one.

I'm not 100% sure, but I think the cheaper one can't charge the laptop that only the more expensive one can....

Probably the ending CH means that a Swiss mickeymouse cable is included.