I have a magnolia B25 and absolutely love it. It's not a barbie pink though it is bright - it has purple/mauve tones in certain lights as well and is beautiful to look at. I think both are year-round colours especially in a small size such as a b25 because they are bright pops of colour and go well with virtually everything, especially if you wear lots of neutral clothes. RP was AW2017 and magnolia is SS18 so I guess you could say RP is harder to get as they do not make the colour anymore. Pinks are very youthful and I know a few ladies who are in their 50s and trying to by more and more pink Hermes bags. Either way, you can't go wrong as both are lovely colours! Here is a comparison on Instagram from priveporter which I found helpful when deciding on Magnolia: