In NSX-T routing is different. You have T1 and T0 routers, both of which have a distributed component (called DR) much like de DLR. The difference is that they can have a centralized component (called SR) that is hosted on an edge cluster. It is important to note that there is no such thing as a virtual appliance router, like the ESG in NSX-V. The NSX-T edge is a host for centralized services of the T1 and T0 gateways.
Please read the design guide on VMware® NSX-T Reference Design beginning from page 44 and you should understand this better. If you still have any doubts you can ask here.