I'm not sure (don't have it in front of me) but they either had short hair or shaved heads.
Well, one was TOS's Kor in the
IKS Klothos (TAS). Kor had some forehead bumps - although even in TOS he had a fairly craggy forehead! - and one Klingon resembled a ST:TMP Klingon, with the extended backbone/crest extending over a balding head.
I saw some preview pages from
Nero #1, and I think they showed Kor confronting the
Narada crew in 2233. I have a hard time believing he was already a captain 26 years before "Errand of Mercy" -- he didn't seem that old. Given that and the ridges, maybe this is a different Klingon named Kor.
Plus we did get an explanation that some Klingons still have their regular forehead and the others had human appearences. I think that was in Forge in Fire.
Don't you actually mean Time Will Tell?
Don't you actually mean
Blood Will Tell? Other than that, you're both right.
Forged in Fire and
Blood Will Tell both build on the reality established in ENT: "Affliction"/"Divergence" that the virus that created the smooth-headed Klingons affected millions -- far from the entire Klingon species, but a sizeable minority. In fact, the novel and the comic miniseries take seemingly incompatible views of the issue; in the novel continuity, the smooth-headed
quch'Ha are a minority excluded from power and subject to discrimination, used as cannon fodder in the fleet, whereas in the comic, the
quch'Ha hold positions of influence and make up a fair portion of the High Council.
I think these can be reconciled if you assume they both represent the biases of their viewpoint characters. The truth could be somewhere in the middle, with some
quch'Ha playing up their achievements and seeing their status in a positive light (like the viewpoint character in BWT), and others dwelling on the obstacles and injustices they face and seeing their status in a negative light (like the characters in FiF). The different time frames of the two works could also be a factor; the
quch'Ha could've had a higher status around the time of TOS but lost most of it by the time of FiF.