TruSeq Exome Kit bed file old version
Usually it is more problematic to work with older versions of data with newer protocols than the other way around.

In this case, I think that the features annotated in the (newer) bed file should be more accurate than the older one. Unless you specifically want to compare your experiment with a previous experiment performed with a bed file from 2012 you'll be fine using the newer one. 

However make sure that you are correctly using the right file and that you report (or record) each version of protocol and data used in case some doubts arise.