CVI is explicitly partisan and can spend money in ways that more effectively benefit Democrats. VPC is a non-partisan organization and donations to it are fully tax deductible
Center for Voter Information is a non-profit, non-partisan partner organization to Voter Participation Center, both founded to provide resources and tools to help voting-eligible citizens register and vote in upcoming elections.
You said that
CVI is explicitly partisan and can spend money in ways that more effectively benefit Democrats. VPC is a non-partisan organization and donations to it are fully tax deductible
But on their about us page, it states
The Voter Participation center also states