They both modulate the docking proteins so that vesicles fusion in changed, even if in different ways

They both modulate the priming and docking processes for vesicles fusion, even if in different ways

They selectively modulate only specific inputs to target cells

They both modulate how neurotransmitter is produced and stored in the pre-synaptic terminal 

They modulate pre-synaptic terminal voltage-gated Na⁺⁺ levels