I'm growing both too and I even have 1 of each growing together in a 30gal container. To me the bishops hat is sweeter and the starfish is hotter. I made a mash with my first harvest of the 2 with garlic, salt and vinegar. It'd good to share with people who think they like hot but freak out when they smell my habs and brains mash.
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BTW, they are always very hungry for nutrients. I have to double what I give my chinense for these guys and it still seems like not enough.