I'm afraid I don't have any experience with 3D Coat's retopology. I hear they're pretty decent, and if you're planning on buying 3DCoat anyway, it may be worth it to get a 2-for-1 that way. You should just go watch some 3DCoat retopology videos and see what it's capable of. That said, I love Topogun. We use it in our…
Both have their own benefits and drawbacks. I will list what they are for me but you're the one who has to give both a try and decide for yourself which is better. Here's what I observed: ZBrush pros: -Integrated topology tools - no need to use an external app and import/export the mesh -High-res mesh does indeed look…