The words erotic and pornographic are used almost entirely as evaluations: the first as a compliment, the second as a dismissal. That is a shame, because underneath the snobbery sits a distinction that is genuinely useful to anybody making this material, describing two different sets of priorities that call for different structures.
Set the value judgement aside completely. Neither word describes quality. What they describe is what a work is optimising for, and works that have not decided which one they are tend to be less satisfying than works at either pole, because a structure that serves both at once does not exist.
Anticipation versus arrival
The first mode is built around delay. Its pleasure comes from what has not happened yet, from noticing, from the gap between what is wanted and what is available. Structurally it needs obstacles, interiority and time, and it tends to withhold, because withholding is the mechanism that produces the effect it is after.
The second is built around arrival and availability. Its pleasure comes from what is present rather than from what is deferred, and structurally it needs access, clarity and directness. Delay in this mode reads as obstruction rather than as tension, which is precisely the opposite of how it functions in the first.
Neither is more honest
There is a persistent claim that the first mode is more sophisticated and the second more honest, and both claims are mostly about social positioning. A work built for anticipation and a work built for arrival are answering different requests from different readers, and doing either well requires real craft that the other does not necessarily transfer.
The useful test is whether a work does what it set out to do, not whether it chose the fashionable aim. That is the same argument as the depiction question in the piece on depicting versus instructing: fair criticism starts by identifying what the work is claiming.
What goes wrong in the middle
Work that has not chosen tends to build anticipation and then abandon it, or to be direct and then insert delays that feel arbitrary. Readers experience this as a work that keeps changing its mind, and it is the structural version of the consistency problem described in the piece on explicitness as a choice.
It is a very common failure in long-form work, where a story built on anticipation reaches the point where the delay ends and then has to operate in a mode it was not designed for. Planning the transition, rather than arriving at it, is what separates the books that manage it from the ones that deflate.
How the choice changes the drawing
Anticipation rewards partial views, off-centre framing, obstructed sight lines and attention to faces. Arrival rewards clarity, unobstructed staging and legible geography. These are opposite compositional instincts, which is why work that mixes them without deciding often looks inconsistent from page to page as well as reading inconsistently.
It also changes pacing. The first mode uses long approaches and short payoffs; the second front-loads and sustains. The beat structures for both are covered in the piece on pacing an intimate sequence, and choosing which shape you are building is a decision worth making at outline stage.
Audience expectations follow the mode
Readers arrive with an expectation formed by how the work presents itself, and they judge it against that rather than against some general standard. A work that signals one mode and delivers the other disappoints even readers who would have enjoyed the mode it actually delivered, because they came for something else.
Signalling is done through cover, description, tags and title, so it is largely a writing job rather than a drawing one, which is the discovery argument made in the piece on how readers search. Being plain about what a work is costs nothing and prevents most mismatches.
Choosing which one you are making
Decide at the outline stage, structure accordingly, signal it honestly, and plan any transition between modes deliberately rather than stumbling into it. That is the whole of the practical advice, and it works regardless of which of the two you find more interesting.
Characters here stay fictional and unmistakably adult in either mode, as set out in the reader agreement.