Hi p1esk, RNNs can be more tolerant to noise because they can learn transient or dynamic attractors. If the inputs move an RNN into an attractor, small changes due to noise make little difference to the state.
Recurrence can help with robustness in some other very important ways as well.
Citations for this dates from the 80s and 90s. I don't know the best reference offhand. You could look at some old Hinton stuff if you're a fan. Lots published on this.