Not way thicker, but thicker indeed. 20mm at the nut (like Jung posted).
It's also narrower. 42mm at the nut as opposed to the usual 43 on Ibby Wizards.
IMO, the biggest aspect that makes it feel different than an Ibanez Wizard II is the shape. It's rounder and more U-shaped (duh), as opposed to the flatter, more D-shaped Wizard II.
The fretboard radius is also 12", which is rounder than the Wizard.
The frets are also bigger than the usual frets on Ibanez necks. Not entirely sure if they are taller, but they are wider for sure.