As far as consistency goes I wouldn't call either player consistent. Inglis started the year strong then disappeared soon after. He played well in Origin without being totally dominant then disappeared again. He's only come good again last night.
As I see it the main bonus' of each player are:
Hayne - Stong defence, good vision, good playmaking skills
Inglis - Pure strength, good vision
Hayne:
Tackles - 76
Missed tackles - 21
Inglis:
Tackles - 81
Missed tackles - 9
On the opposite I find it interesting that Inglis has more tackles than Hayne but much less missed tackles.