It is a bit of a dartboard situation. I got both, I haven't opened orange and I don't know if I will, but sometimes I try to make collection decisions based on historicity. What is going to be the point of my collection some day?It's a pretty neat situation where there's no real wrong answer.
I don't think of the prototype colors as an indication of what the G1 toy would have been. It is POSSIBLE because Galvatron got totally switched up, but she was a very early mockup. I think the concept of Arcee was a Barbie that turned into a Barbie car and pink was always where she would have gone. To me the reason for the prototype color version is a celebration of the prototype itself, not a gamble on what her toy would have been. I wouldn't have changed the head for the pink version, if it had been me. It is perfectly likely that the G1 toy would have kept a head that didn't match the cartoon very well.
I have done nothing so far. I WILL put her in the display where her compatriots are, which is the death of Optimus Prime. In her robot mode, she does look consistent (which is to say sort of inconsistent) with those others, I think. I don't wish I hadn't picked her up. I was just looking forward to a simplistic, blocky Transformation and what I got was CR era at least.