Trundle x Malphite, who would win?

I've seen someone on the comments section of a site, saying that one of the most interesting matchups is Trundle x Malphite, seeing how both can negate each other perfectly.

It makes sense, since Trundle is an anti-tank AD bruiser, yet Malphite is an anti-AD tank. Malphite has an attack speed slow, but Trundle has an attack speed self-boost. Both also have a powerful slow, and although Malphite steals an enemy's movement speed, Trundle has a movement speed boost of its own on another ability.

So I would like to know, who would win in an 1x1 situation, assuming that both are equally skilled. I've actually seen that matchup once, but Trundle was skilled, and Malphite wasn't, so Trundle obviously won.