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 points out some distinctions: Ningirima is consistently female, whereas Ninkilim might be regarded as a male deity; their placements within god lists vary; despite being linked to snakes, the relationship between them is not identical.