We have built a RNN, GRU and LST for the development of our Binary Classification models. When trained on a similar architecture, all of the models gave similarly high accuracy of about ~99%. Though RNNs proved to be slower compared to the newer LSTMs and GRUs, the accuracy of our Binary classifier was not affected.
https://medium.com/@nandangrover/rnn-for-sequence-to-sequence-classification-5d41a2b6d8fd