I got offered a phd studentship from a great research group but the research itself is a slight detour from my usual research passions, its not far off and it would still be an amazing phd. However, i have an interview on monday for another phd studentship where the group is smaller and maybe not as good but the project its self is more my passions. Do I email the first professor to tell her that i want to wait until i hear back after monday before i accept her offer or do i not say anything wait until monday and then say something. I dont know how long after monday it will be until i find out if i got the other one and i dont know how long i have to accept this one and i want to be able to weigh up both opportunities as they are both a fit for me in one way or another. Please help😭