Also, remember that you can show a character's reactions without repeating the scene line for line, or even repeating most of the lines. Rarely does your story really need a line by line repeate.
Here are a few examples of some ways to show the reactions of both characters without boring your reader:
The easiest and cleanest way might just be to show the reader the other side's reaction. When the non-POV character takes over the POV, she/he can essentially comment on what just happened through internal monologue. Like, for (badly written, but just as an) example:
Jimmy thinks he's so smart, thinks I'm just going to go along. Well, he has another thing coming.
So, in my lame example in the other POV it looked like the non-POV character was going along, but then the reader gets to see that internally, the non-POV character was just faking it.
Another example, continuing my scenario:
Maybe in the scene, the non-POV character agreed to go to an event at her kid's school, rather than to the office. But when the scene shifts to her POV, you show that she has other intentions:
"Jimmy? Hi," I said, cradling the phone so Sarah couldn't see it from the car. "Listen, change of plans. I have to go to this parent-teacher meeting. But start the backup and then call me at two-thirty with a crisis. okay?"
That way, you don't have the POV character commenting to the reader through internal monologue, but the reader immediately gets that the non-POV character was just pretending to go along.
Or, another technique:
Don't repeat the dialogue, but show some overlap. Like, again, continuing my example scenario:
She yammered on about the parent-teacher meeting until I could feel the headache forming.
"Are you listening to me?"
"Yeah," I said. "Fine. We'll go together."
Still she wouldn't let it go...over and over until...
So, in the first scene there was a long conversation, but when you replay part of it in the other POV you don't go blow by blow -- you just show a line or two, or maybe a key event, to orient the reader, without bogging the pace down.
And there are likely other techniques, too. The key is to show the reaction without the repetition, whenever possible.
~suki