Well, "comparable" to Nightcap might be an overstatement, unless you just take the term "comparable" completely in its denotative sense. It is possible to compare the two, as they both have a defining flavor of latakia, but Nightcap is just much, much stronger. I would hazard a guess that most people who have a taste for latakia would enjoy both, and most people who don't like latakia would enjoy neither. That was more my point, I suppose.
On the other hand, Early Morning Pipe is considered a very mild English blend. EMP and Frog Morton's Cellar, though quite different in some respects, would probably be quite comparable in terms of strength and latakia content. The main difference is that FMC has a bit of topping, while EMP doesn't, and EMP has some Oriental leaf, while FMC doesn't.
If you found the smell of EMP terrible, you're probably reacting against the latakia, since that is the dominant and defining flavor and aroma in most English blends. I'd guess you wouldn't be a fan of FMC either.