Clinton and Sanders differ in terms of policy preferences and even more in terms of instincts. For climate warriors, I am not sure the work we will have to do differs that much regardless of which one is President.
If Sanders is elected, we will need to organize and advocate so that he has support. IF Clinton is elected, we will need to organize and advocate so she is limited in the degree to which she can triangulate to the right.
Either way, we need to organize and advocate.