That's funny...for some reason I had in my head that the SM6 always felt the smallest of the last several gens to me. That said, they were the only ones I had in the black finish, so it may have been my eyes playing tricks on me.
Also, I have mentioned this in other Vokey threads before, but if you feel like off the rack Vokeys look a little chunky (I personally do), then I cannot recommend enough doing their custom grind option and getting the Tour Grind. It shrinks the overall appearance of the head significantly. I still remember opening my first set of Tour Grinds from them (the SM8s). I grabbed the PW first and looked down at it and was like "holy sh&t that looks great." Just takes material off in all the right places and gives it a much more compact and appealing appearance. Their hand ground program is just levels above what anyone else can do. I have owned probably 10 of their hand ground wedges, and they do an amazing job. And for lefties, it's the only way to get certain offerings. For example, no A+ grind offered for lefties, but I just asked them to make me one out of an M grind - no problem at all. A little pricey I guess, but who's counting? 😆