I'm going to address this question as blatant as possible.
To what extent would you base a decision on taking on an offer* based on probability of conversion (into summer internship/grad role) rather than the prestige of the institution. Understandably, culture, division, scope for progression would be taken into consideration but for simplification purposes the deciding factors are probable likelihood of conversion and brand name, assuming both carry equal weighting.
The institutions and stats for conversions are as follows:
1) Goldman Sachs (20% chance of conversion) - Great Brand Name (generally deemed most reputable on the street*)
2) Bank of America Merrill Lynch (45% chance of conversion) - Bulge Bracket*
3) HSBC (70% chance of conversion) - Not apart of the big IB names
4) Barclays (60% chance of conversion) - Some say the least favoured in terms of the Bulge Brackets
5) Citi (60% chance of conversion) - Similar to Barclays, carries a little more clout
Rank in order of how you would decide.
*Offer = relating to Spring Week (pipeline schemes for banking institutions)
*Street - Another term for wall street (or in this case just the big banks)
*Bulge Bracket - Top performing Investment Banks (revenue generation)