At the national level, I think the Right is more open to pro-choice Republicans than the Left is to pro-life Democrats. So, yeah, I think the Left focuses more on it than the Right. They have a litmus test.
I'm not sure it makes sense to compare hard core abortionists with hard core pro-lifers. They are all pretty obsessed, I guess. Not sure how you would compare them.
For me, I know that pro-life is the most important voting issue for me. But, I do stay emotionally detached from the issue. It is easier not to storm the gates of the Auschwitz if you don't think about what is going on there. If I were obsessed, I would act differently. I'd say most pro-lifers are not obsessed, because they restrain themselves so well.