There is nothing different about the workflow, the hours and the grind.

Some people might say "well at least the pay is better" - not really. The same proportion of bankers making the crazy bulge bracket IB or S&T salaries is the same as the proportion of lawyers going to MC / WS firms, and the salaries are not too different at that level. In other words, if you are good, you are going to get the good salaries in either field.

The only real reason to go is if you enjoy crunching numbers and making slides instead of doing legal research and drafting documents which, to me, were equally mind-numbing.