Once again, Wikipedia says it best:
http://en.wikipedia.org/wiki/Abortion_debate#Terminology
I don't know which side is morally superior, but the arguments from both sides are so often really retarded. They dodge the issue the other side brings up and focus on character assassination instead to win sympathy votes. If this were done to gain actual votes for legislation then I'd understand, though it's still pretty under-handed but at least it's clear and goal-oriented thinking and action. But these are the kind of arguments I hear on the street, where the individual fight doesn't make a mite of difference.
Perhaps this reveals a slight bias but I find the pro-choice camp often offers the dumbest retaliatory remarks. On the other hand, I quite liked gcomeau's argument in favour of their side (although I do agree with ESC's criticisms) so hopefully I'm not just blinded by prejudice. It actually addressed the issue of whether the fetus has any right to use the mother's body, instead of dodging the issue and complaining about how sad the mum's life would be or how unfair it is for people to tell her what to do when she didn't mean for things to turn out like this, it was totally an accident and you guys are so unfair! - which is really just the sort of immature, whiny thing a kid says to his parents when they're forcing him to face the consequences of what he's done. Demanding grace and a second chance and all that is also sort of missing the point, I think - again, totally self-focused (should try to get the issue of the fetus's rights out of the way instead) and sort of forgets that grace and second chances are gifts, not something you have a right to. These sorts of things are too easily attacked so they really need to find better avenues of defense (which I think they do have, it's just that the stuff the common man resorts to is pretty weak). Besides, saying you deserve a 'second chance' and that it was an 'accident' kinda emphasises the fact that you made a mistake and should've been a bit more careful, which emphasises the fact that you're responsible for this 'terrible thing' that has happened. Killing someone because they're sort of in the way and you want a second chance, mum, is generally considered a really bad solution to your guilt. (I'm not saying fetuses can be considered people, but this is how the pro-life movement would see it, and that's why this line of argument is totally useless.)
Having to carry your rapist's baby must really suck though. But again, I don't know if that's enough justification to end a life. It's the same sort of moral conundrum presented in many mind-fuck movies: Kill an innocent man or you'll be horribly tortured, or something along those lines. Is it fair for the man to die? I don't know how to answer this kind of question. I would guess not though, and I think most people would agree. So again the question shouldn't be whether the pain caused to you is enough to justify you killing another person, but whether that life you're ending actually constitutes a person. (Otherwise you'll be too easily shot down by the moral police.) Afaik it doesn't, although that still has its own issues. Life is a complicated matter.
Anyway, one argument I find quite snazzy uses the actual legal status of children (instead of talking about morality which is sort of murky) to argue for/against the type of rights a fetus should have. This is the clearest argument I think. The law says this, you check to see if what you're saying fits in, and if it doesn't, too bad - because at the end of the day this is a legal issue. Of course that doesn't leave room for change that might be morally necessary but the least you can do is check it out first. [This paragraph sounds pretty sus.]
Whether fetuses can legally be considered people, and whether their rights take precedence over the mother's, and whether the two are more accurately considered one entity, and whether their status as person or non-person should affect their right to life, and how this ties in with animal rights movements, are much more interesting and more productive lines of inquiry imo.
The donor mother idea sounds really interesting. Would it be that much more difficult than surrogacy? Maybe it's possible now.