So with the change to WOTA, does it now stack with spellvamp?

So according to the change, wota no longer gives spell vamp, it now gives true blood. Does that mean spell vamp and trueblood are different unique passive effects that will stack? Or since revolver builds into wota, it is still in the same category.

I know that if it does stack it is probably unintended, just due to the nature of only one spell vamp item being changed. Just wanting to check though.