Tactical combat: Units on foot can move the same number of tiles as a warg unit

I was advancing on an enemy archer on the far end of the battle field. I sent both a spearman unit amd a warge spearmen unit after the archer as far as they could go, and both ended in their turn standing right next to each other.

I would have expected the warg unit to be a few tiles ahead. (They both started their turns side by side)

I don't know if this is by design, but IMO, it should be changed.