I've read a couple of place that Ron Moore really wanted to call the new Defiant (aka the former USS Sao Paolo) the Defiant-A, but they didn't want to shoot a whole bunch of new shots for it.
Now I'm personally glad they didn't do that, because always thought the Enterprise lineage was "special" and that the letter suffix was a privilege limited to ships with that name. (I tend to ignore that weird "1305-E" registry they gave the Yamato that was contracted later anyway, and the Relatively, of course, is its own thing). Besides which, remember the new Defiant wasn't actually the second ship with that name, but the third (at least), so an "A" wouldn't be appropriate anyway.
I am sorry they used shots in "What You Leave Behind" that make the old Defiant's registry so painfully obvious. There's absolutely no reason the new ship would have that. If they ever get around to producing Blu-rays (or just some HD version of the show).
Now I'm personally glad they didn't do that, because always thought the Enterprise lineage was "special" and that the letter suffix was a privilege limited to ships with that name. (I tend to ignore that weird "1305-E" registry they gave the Yamato that was contracted later anyway, and the Relatively, of course, is its own thing). Besides which, remember the new Defiant wasn't actually the second ship with that name, but the third (at least), so an "A" wouldn't be appropriate anyway.
I am sorry they used shots in "What You Leave Behind" that make the old Defiant's registry so painfully obvious. There's absolutely no reason the new ship would have that. If they ever get around to producing Blu-rays (or just some HD version of the show).