Nitto Terra Grappler or Ridge Grappler?

I had Terra Grapplers on my Tundra and loved them. Aggressive looking but quiet and smooth on the highway. Very minimal difference in mileage over the stock tires too. Can’t speak for winter conditions though as I had dedicated snow tires.

I don't see a need to sipe the G2. There are enough biting edges in the block tread design that it makes siping unnecessary in my opinion.

Pick either one and sipe them for winter driving.

I cant speak to the Ridge Grappler, except to say that I see a lot of them. I do have a set of the G2's on my wife's 4X4 2016 1500 GMC. I have really liked them, she stays on the highway but drives back and forth to Montana throughout the year. The G2's are really good on ice packed roads and quiet on the highway. They have never been in the mud but I would imagine they wont cleanout real well until you really spin them. They wear very well, and what else I like about them is there are no raised portions in the tread design, meaning they maintain their tread through out the depth of the tread. I will put those back on when she wears them out. They are P series as well.