3rd Party DUE compatible

Hello I have been developing my project with an original Arduino DUE , I have 2 of them but now , once I go to the final Board design It might be an issue with Space therefore I was checking online if they are any smaller DUE compatible boards.

I have found one the link is below http://www.inhaos.com/uploadfile/otherpic/DOC-DUE-CORE-V02-20180113.pdf

Before I order I would like to know if anyone of you have ever used suck boards ad if the are compatible with Arduino IDE & Atmel Studio

Thanks

https://www.ebay.com/itm/Due-Core-SAM3X8E-32-bit-ARM-Cortex-M3-Mini-Module-Arduino-Compatible-UC-2102-/322146849461?hash=item4b0172d2b5