The inkscape snap has a number of bugs:
The theme handling is broken, defaulting to a win95-like theme.
It cannot open apps directly from Nautilus. Choosing to open a SVG (for example) from Nautilus results in an error. The same file can be opened from inside inkscape.
It cannot import eps files, complaining of a missing library/plugin.
None of this bugs are present on the deb or flatpak version.