Need help deciding on offers between boutique and bulge

Take Wells Fargo IMO. If you don't have a return offer at either, people will know the legitimacy of the Wells Internship

WF. If Key is just entering the market they may have an unstable book of business / no guarantee of longer term success. Remove that risk from the equation and go with the bigger bank that will provide more opportunity / name recognition.

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WF for sure but since it's just a super day and not an offer yet, try to extend the deadline to accept the KeyBanc offer as much as possible. When you're at the WF super day, also make sure they are aware you have an exploding offer (makes you more attractive and ensures they don't take too long to get back to you)