We are using both Lenovo/IBM branded Emulex OneConnect OCe11100 and Emulex OneConnect OCe14000 in our hosts.
According to the download page the same driver (elxnet) should be applicable to both models:
This Emulex driver enables support for Emulex's OCe11x (DID:0710), OCe14x (DID:0720). Emulex VID:19a2/10df and SVID:10df.
This driver also supports Emulex's equivalent OEM-Branded versions.
What citeria should i use to determin the latest driver? The release date or the version number...