Are you talking about the Hi-Tek coatings like on Bayou bullets? I have not personally done this but understand it to be close in time due to having to coat and bake the bullets twice to get them thoroughly coated, but a bit less tedious in the handling of the actual bullets as you can shake to coat and dump out to bake vs having to be a bit more careful powder coating them.
If you want to get a PhD in coating lead bullets check out castboolits.gunloads.com, they have an entire subforum dedicated just to bullet coatings and techniques.