Hard to decide. Both are good in their niches and will flounder outside their comfort zone. I can't see Tapsee pulling off a Raazi, and I can't see Alia doing Pink. Alia, though, has the advantage of time to grow into Tapsee-type roles.
Tapsee has something very off in her acting. She chooses good roles but there’s something.... dead in the way she emotes/in her voice modulation . Cant put my finger on it. Imo. Noticed this a lot in Pink and Badla.