We have the Gemini and really like it. From what I understand, the butterfly has a piece of material between you and baby while they are worn. This makes it easier to get them on your back, but makes breast feeding while wearing impossible and I would think it would be hotter too. The Gemini also allows baby to face out, I don't think you can do that with the butterfly.
The gemini also allows a hip carry and the butterfly doesn't. You can transfer the baby from one person to another w/o taking her out with the butterfly, not with the beco.
Re: Difference Between Gemini and Butterfly and Butterfly 2?
The gemini also allows a hip carry and the butterfly doesn't. You can transfer the baby from one person to another w/o taking her out with the butterfly, not with the beco.
https://www.quirkybaby.com/beco-butterfly-vs-beco-gemini.html
https://www.granolababies.com/nurturebabynaturally/2010/08/beco-gemini-vs-beco-butterfly-ii/