E-C is Ambassador class, in canon.
Chain of reasoning:
Many ships of this class have been shown on screen and named. Therefore, if any one of those ships is stated to be Ambassador class, all are. (Until some newer canon source contradicts that).
USS Zuhkov, NCC-62136 appeared in "Data's Day." In "Brothers", The Zuhkov is listed on display on the bridge, same registry, class given: Ambassador.
Later the fact that the name was misspelled (it should be Zhukov) and the registry was out line with other Ambassadors was noted and fixed. Another version of the display was used in "All Good Things" listing USS Zhukov, NCC-26136. Obviously production intent was that these were the same ship, but given the exceptionally narrow definition of canon in play atm, I'll disregard this "second" ship.
If NCC-62136 is Ambassador class, NCC-1701-C is also Ambassador class in canon.
Chain of reasoning:
Many ships of this class have been shown on screen and named. Therefore, if any one of those ships is stated to be Ambassador class, all are. (Until some newer canon source contradicts that).
USS Zuhkov, NCC-62136 appeared in "Data's Day." In "Brothers", The Zuhkov is listed on display on the bridge, same registry, class given: Ambassador.
Later the fact that the name was misspelled (it should be Zhukov) and the registry was out line with other Ambassadors was noted and fixed. Another version of the display was used in "All Good Things" listing USS Zhukov, NCC-26136. Obviously production intent was that these were the same ship, but given the exceptionally narrow definition of canon in play atm, I'll disregard this "second" ship.
If NCC-62136 is Ambassador class, NCC-1701-C is also Ambassador class in canon.