Plant / utility patents and plant variety protection (by treaty):
There are differences but also similarities (e.g. homogenous traits).
Some of this stuff has been discussed before in other threads. While not directly the same, there is some interesting content here on copyright versus patent versus PVP versus licensing etc:
Also, see:
And, genetically engineered plants may have entirely different protections when employing patents or other protection mechanisms.
None of this is easy nor inexpensive to prosecute.