Regarding a Storm Wolf vs Storm Raven comparison, since the Wolf has a higher transport capacity than a Raven in addition to having a slightly higher number of weapons it appears that the Wolf is better able to perform transport duty. It's a bit arguable though since Ravens do have access to an Assault Cannon/plasma cannons, missile launcher system/hvy bolters (via weapon swapping) AND one shot missile. On paper, the wolf is still +1 TL melta/Heavy Bolter and TL focused hellfrost cannon shots above a similarly configured storm raven. In my opinion, I'd hesitate to say Ravens are a better transport though. What isn't known is if the Wolf can transport JP models though.
I'll conceed that Ravens are better gunships on paper vs. Fangs though. Discounting the Destructor, Fangs end up paying more to upgrade to lascannons and swapping the TL heavy bolters for multi-meltas. Versus Air targets, the Raven will probably win out since it has assault cannons. Versus land targets, I'm tempted to go with the Fangs ability to drop ap3 pie plates on people's heads. Though loading the ship up with two 60" str 7 missiles, I'm almost of a mind to say it's better.