He points out the following differences: while Ningirima is always female, Ninkilim could be regarded as a male deity; their placement in god lists always differs; while both were associated with snakes, the nature of this connection was not identical.
He emphasizes several disparities: Ningirima is always female, while Ninkilim could be considered a male deity; their positions in god lists differ; both are connected to snakes but the nature of these connections varies.