Here are some comparison pics I took today showing the WJ's and WK2's OEM sunshades.
WJ outside view
WJ inside view (no need for sunvisors to hold in place)
WJ inside edge
WK2 outside view
WK2 inside view (w/o sunvisors down)
WK2 inside view (w/sunvisors down)
WK2 inside egde
With the sunvisors down the WK2 sunshade provides a little more coverage but as you can see the WJ fits and stays in place without the need of sunvisors. In general the sunshade definitely serves its purpose and definitely still worth it. Last pic is showing the part numbers (WK2 top and WJ bottom).