LevFin in SF vs. Boutique in NYC

The LevFin group is at Wells Fargo.

I can't decide whether to pursue an opportunity for a summer analyst role at a boutique in NY, or take an offer with the LevFin group. I'm currently at a nontarget, and there isn't an extensive alumni network into other BBs, so not much luck there either. So, what I'm wondering is:

• What would exit opps look like, coming out of either group?
• How likely would it be that I could "network" my way into a different bank in NY, coming from my role at Wells?
• Which would be best experience? (really general question, but I am intentionally leaving it ambiguous to hear broader range of opinions)