Cool technology and opportunities to learn and grow vs. Better manager and less interesting tech?(Bloomberg team choice)

Passed my on-site interviews and I'm trying to decide between the TRAAX (Trade Automation and Execution) team and a different team at Bloomberg. It seems like the TRAAX team has some really cool technology (real time data streaming, etc) and thus some opportunities to learn and be challenged (currently 4 yoe). Which is why I'm leaning towards them. The other team I'm considering is more similar to what I'm doing at my current job, so not as exciting, but I liked the manager a lot more. He seems more personable than the TRAAX managers I spoke to, someone I would get along with easily. My biggest concern is wlb on the TRAAX team as it seems like they are growing rapidly, are a critical time sensitive system, and it seems like the managers are very technical and engineering focused and not as personable. Anyone from Bloomberg have any insights on that team?