What's the difference between DxO ViewPoint and Perspective Efex? Is it worthy to buy DxO ViewPoint if I already have Nik Collection by DxO?

This information applies to version(s): 3, 4

If you use DxO PhotoLab, then it is worthwhile to purchase DxO ViewPoint for a better workflow as it can be integrated as a plug-in palette. However, if you do not own, or plan to own, DxO PhotoLab then there is no reason to buy DxO ViewPoint as well as it will only be a duplicate of Perspective Efex.