As far as I know, JPmorgan has way strong investment banking division than Bear which was a more trading focused firm. Rarely heard that Bear did a large M&A or IPO transaction. Here is a ranking from Vault from the prestige standpoint. I blieve this is based on the number of votes by people.
The 2008 Vault banking employer prestige rankings are here. This year, we surveyed 999 banking professionals in order to rank the top 50 firms in commercial and investment banking.