Is the gray board the same as the whiteboard?

Grey board paper is divided into three types: single grey, double grey and full grey. Single gray is gray on one side and yellow on the other. Both sides of the double gray are gray, but the paper core is yellow; All-gray is gray on both sides, and the paper core is also gray.

Whiteboard can be divided into gray-based whiteboard and double-sided whiteboard. Gray-based whiteboard paper, one side is white, the other side is white and smooth, and the other side is gray and rough. Both sides of the double-sided whiteboard are white and smooth.