Oh also I did say that CNNs often beat RNNs, even for time series, language, and audio. So I generally try them first. You can always stick an RNN on top of the CNN and get the best of both worlds.
I just wanted to take the chance to say thank you for the course. As someone who is interested in the topic but isn't a practicioner, just watching it all work in practice has been fascinating and highly enlightening.
I said, IIRC, that they're very similar in terms of results and GRUs are a little simpler. I've seen some papers show better results for GRU, and visa versa.