No, it's different.

In Stratix IV GX, Arria II GX devices, etc., Lock to refclock mode operates by locking to the input reference clock. Lock to Data mode locks to incoming data. Therefore, in Lock to Data mode, the input reference clock is virtually irrelevant, and the input clock characteristics, etc., have no effect on the received data.

In contrast, in Cyclone IV GX devices, lock to refclock mode operates by locking to the input reference clock, while lock to data mode operates by locking to the input reference clock while receiving data. Follows the action. Therefore, the received data will also be affected by the characteristics of the input reference clock.