While I am unable to offer specific guidance for individual babies, my general response to this dilemma is as follows. (jessicacoll.com)
Individual babies vary in how often they wake, from two to 13 - 15 times a night. (developmentalscience.com)
When choosing a twin baby carrier, the first thing you should ask is whether you'd like to have two individual baby carriers or one carrier meant for two babies. (checkpregnancy.com)