Difference between cv::subtract and operator - in cv::Mat OpenCV

Question

What's the difference between cv::subtract and operator - in OpenCV?

Mat original = imread...;
Mat smoothed, difference, result;

smoothed - original image processed with Convolution with Gaussian kernel;

1)

difference = original - smoothed;

2)

cv::subtract(smoothed, original, difference);

Answer 1

Check this link, both are same.