The references with \'C\' at the end are products built in China and these products are dedicated to Chinese market. In fact the material used with suffix \'C\' is degraded compare to part reference without \'C\'.
If ZB2BE101C needs to be replaced by ZB2BE101 than it is possible because they are same in size.
Functionality wise there is no difference between both.

For further information, Please visit:
https://www.schneider-electric.com.au/en/product-range-selector/661-harmony-xac/?p_url=http%3A%2F%2Fwww.ops-ecat.schneider-electric.com%2Fecatalogue%2Fbrowse.do%3Fel_typ%3Dproduct%26cat_id%3DBU_AUT_661_L3_Z010%26conf%3Dbasket%26prd_id%3DZB2BE101%26scp_id%3DZ010