Am I making the right decision by choosing PE over IB?

Hi - I'm a sophomore from a target school who literally got rejected by all the BBs and EBs (after getting a lot of superdays) and received offers from firms like Jefferies and William Blair. 

I've never thought of going into PE straight out of undergrad because I thought it would be impossible (at least for me). But recently, I saw a posting and applied to and interviewed with a MM PE firm (around 3 billion AUM) and received an offer. 

I've always wanted to go to PE, but I wanted to make sure I was making the right choice before I chose the MM PE firm over Jefferies and William Blair. 

I get that Jefferies and William Blair have the "name" but I'm not sure if I'm ready for IB hours. I get that PE hours are p bad too on the analyst level, but even if the hours are similar, I like the PE firm's culture better than both Jefferies and William Blair's culture. 

Would appreciate any advice!