That's true, I felt like that a bit with Gone Girl actually. I really enjoyed the film and it was a very faithful representation of the book, but I can't help feeling like those who read the book first got more out of that, and those that saw the film first would get more out of that. I feel like the film would have been a very different experience if the book hadn't already left me expectant for all of the twists y'know, it's a first experience that you can only really have with either the book OR the film, not both

And that was kind of the case with Red Dragon as well, I watched the film rather than the book, but still without that reference in my mind then maybe scenes like the faked death would have had even more impact on me if I'd have been watching them with a fresh eye and genuinally had no idea what was coming, instead a lot of the scenes were pretty straight retellings of the source material. There's nothing necessarily wrong with that, I know that the Red Dragon arc was a really popular one among the fandom, but that was actually the one time that I felt like the source material was followed a little too closely for me, I would have appreciate more of the surprises and twists to canon that Bryan Fuller brought in when using the Hannibal book