To me it looks like the narrowness of the head is based partially on Data's earlier appearances, which is not actually how most people remember him.
Brent Spiner was very skinny/lanky for the first couple seasons, while he settled into a more average weight for the remainder of the series (and slightly more full in the movies) which is how most people remember Data.
I do still think the sculpt needs a little more work. Especially around the eyes. I think it's mostly the eyebrows. They look...oddly aggressive. The preview of the second sculpt looks a little more neutral.
Maybe one of them is Lore
I think it's a couple things. For one, like I mentioned above, people generally remember Data looking a little fuller than his early skinny appearance. While people do remember Lore more as that early skinny look because that was that character's most prominent appearance in the show.
Second, there is a slight aggressiveness to the main sculpt. The preview of the second sculpt softens this expression.
I honestly think they should make the sculpt with the softer expression the primary sculpt, and make the second head explicitly into a Lore head with a unique expression.
As it stands, they're both so similar to each other, there's hardly any difference and it's almost not worth the inclusion. Make the nice/kind face the normal head, and make the second head even meaner so that it can be Lore! Then it would be worth it.
