Not quite the mix up you've made, but last week I brewed a single hop batch with Helga to try it out. Once I'd cubed it, I put aside the remaining 20 grams to dry hop it after the main ferment was complete. The same day I was due to dry hop a batch of my Pride Of The Galaxy ale with some Galaxy. I grabbed the unmarked container thinking it was the Galaxy, but turns out it was the Helga. I kegged it on the weekend and the Galaxy/Helga aroma combo was incredible. Only problem is now I have no more Helga to dry hop the Helga batch with.