Trail conditions aside, I really like the wolverine, but I consider it to be an advanced skill level tire. Where it excels is enduro/super d style events because it offers tremendous speed while still retaining enough control to handle the corners. But it requires a higher skill level to get this performance out of it. Instead, I see a lot of riders use it as an XC tire so they can get close to the rolling peformance of a true xc/xc race tire like a nano, RaRa, race king, etc while retaining some increased control. The weirwolf (IMO) offers more control at a cost of speed. It's not a slow tire, but it is slower than the wolverine.
OP - for XC racing, I would not use the weirwolfs. I would use wolverines front and back on courses that are technical and or loose, with few long straight sections that require more straitline speed. I would use the wolverine front with something faster in the rear (RaRa, Race King, etc) on more tame courses that may have a difficult descent or two. I would use something faster both front and rear on anything dry, hardpacked, and or requiring extensive time on fire roads or other sections.