Sorry, maybe I did not put it in a good way. The Godox flashes work well, that includes the TT350 and the autofocus assist. That is my answer to your first question. I can only give you my opinion but plenty of reviews on the Godox flashes say the same thing. I would suggest one of the models with Li-Ion accus (V350F is the one in similar size and power to the TT350F). That I volunteered as extra information to your question, please disregard it if you do not find it useful.
I think the Godox are better than the Nissin, in my opinion. That is the answer to your second question. I also volunteered some extra information about the remotes and about the Meike flash, please disregard also it if you do not find it useful.