The crime of rape is either abhorrent or it’s not
It is abhorrent but it's not as simple as that.
Statutory rape is a strict liability crime, like speeding, where if you've done it, it doesn't matter whether you meant to or not. (Was there sexual contact between an adult and a child, yes/no.) Bear in mind this is the theory!
Rape is generally really poorly prosecuted (as is statutory rape unfortunately) and part of what Germaine Greer got roasted for trying to explore is the problem whereby there is a sliding scale of awfulness, where being gangraped, mutilated and murdered is on one side and a questionable drunken fuck both parties regret the next day is the other end of the scale (I can't think of a non-awful rape scenario so sorry if that comes across as dismissive).
There are crimes on the "less awful" side but courts are prosecuting based on what they consider as the "most awful" side. Greer suggested that lesser penalties (but more of them) would achieve greater justice than stiff prison sentences but only a 3% conviction rate, which is pretty much what we've got.
So I guess I'm of the view that not all rapes are created equal, in the same way not all assaults are. Rape is much more invasive and has the potential to create unwanted pregnancy or psychological trauma as well as physical damage, so in my view it should always be seen as more serious than non-sexual violence, but within the crime there are degrees.
How we capture that I have no idea, like I said it was difficult to think of a non-awful scenario - it's easy to see which are the worst but hard to argue which are the least-worst.
However I'd argue within that, rape or sexual torture that is broadcast and which creates additional psychological distress is more damaging for the victim. So rape porn should be prosecuted against with that in mind.