How can you say one is better by far when they are 99.9% identical...the only differences are visual so it's solely based on personal preference. I like the VI better but I'm not gonna say it's better by far than the IV...
4 coming with the best RDJ sculpt to date & the 6 not coming with any is more than a visual difference or color variation so I don't think they are 99.9% identical at all.