As far as I know:
* VWIC2-2MFT-T1/E1: This part# often comes with router, which you buy in bundle.
For example: You buy a Cisco 2911 router and this card. So that, this type of card will appear VWIC2-2MFT-T1/E1
* VWIC2-2MFT-T1/E1= : This part# often comes when you buy the card only.
With the explanation above, I think you can solve your inquiry!