I bought the updated one then, when I went to install it, found mine had already been updated so I sold the one I bought.
I think there's a total of three different designs. They all have the same basic casting and bolt pattern. The '07-'09 have one style of PCV nipple and the "faulty" PCV baffle with the hole in poorly thought out location. There's a cover with the revised PCV baffle thaat relocates the hole but retains the PCV nipple for the original hose to attach to. Then there's a third design that has the revised PCV baffle as well as a revised PCV nipple for the hose that the 2010+ have.
Maybe? I only know of the updated one for the Gen4. Although, the updated one can be used on the Gen3. The nipple style doesn't matter if you have a catch can with regular hose and clamps.