This message was posted on behalf of Intel Corporation
Please check on the Intel® Compute Stick STK1AW32SC’s product change notification document, you would find that later versions of the STK1AW32SCR (SA H93322-103) will run an updated Windows 10 Home Build 1511 along with driver updates.
Here is the PCN 114303-00 information:
If there is anything else you need, please let me know.
On previous post added by Hellen the information is partially answering your question as it only refers to STK1AW32SCR and changes on that product only.
The letter "R" at the end of the product code: BOXSTCK1A32WFCR or STK1AW32SCR as you mentioned was just appended to the product code to reflect 1st phase (internal calendar). Only difference is that later devices (for instance the BOXSTCK1A32WFC) have additional regulatory logos on the labels and in the collateral. There are no design or functional differences.
I hope this helps,