I don't know which version S110 is in the Simblee. But, it is definitely not the ancient one used in the RFduino. It is one of the versions Nordic released for version 3 hardware and supports OTA. The RFduino is version 1 hardware and does not support OTA. Probably best guess is which one was last released before the Simblee was released.
Hopefully, RF Digital will say which one.