@Marcelleparcelle Congratulations, but you should discount all the romance about access to Wall Street. Most responding have no idea what “Wall Street” actually is nor do they know that all banks have been reducing staff for the past five years. It is likely to continue, BTW.
If you need further information I would look for facts. LinkedIn is the best source for this information and Vanderbilt is ranked in the Top 25, Williams is not. In fact, only a handful of all Williams alumni are working at investment banks in corporate finance. Many of these people also have graduate degrees.
Out of the two, pick the one you like the best overall. If you think that Goldman Sachs is waiting for you to graduate from Williams, you will be disappointed.