Anyway, by doing this I doesn't get the expected result:
- Open Inkscape
- Create any figure
- Duplicate the figure and move the duplicate so it doesn't overlap the original figure.
- Make the original figure's background gradient.
- Copy (Ctrl+C) the original figure that now has a gradient background.
- Select the duplicated figure and paste style (Shift+Ctrl+V).
And you'll see that the figures is not equal any more when looking at the gradient background.
It looks like the two objects now shares the location of the gradient handles.