I prefer the point of view that your primary bower should also be your storm anchor, so for your boat seems like the 33 would be a better choice for almost all conditions.
If you can fit the roll bar Rocna, that would be best. The Vulcan is great for bowsprits that can't accommodate roll bars, but it is a very different anchor that behaves differently and is not as easy to set as the roll bar version.
I've had both on different boats and the original Rocna with the roll bar became my standard that I apply to all anchors for ease/reliability of setting, strong holding, etc.
Both Rocnas are scoop anchors though, and the latest tests from experts I trust show that they're prone to problems resetting when the scoop gets fouled with sticky mud or debris.
So applying my high standards to find the "perfect" anchor for my needs I finally found the Sarca Excel, made in Australia
by Anchor Right and imported to US and Canada
by Groundtackle.com. I ended up selling my Vulcan and finally have the ease/reliability of setting and resetting that the original Rocna spoiled me for.