Hello! I think that the word you should rather be using here is "any subtle differences between avenues and ways?" The word "nuance" implies "distinction" or "characteristic" which isn't really what you want to know. I think that what you want to know is this: Are there any "subtle" differences between avenues and ways?" Yes, there are very slight differences: "avenues" in this context would mean "ways of approaching a problem or making progress towards something" and "ways" in this context would mean "methods, styles or manners of doing something" But both of these words would be okay to use in this sentence. I hope that helps!

While this is technically correct, avenues is not typically used this way and would sound strange to most native speakers.. The word "ways" would be more common in conversation. In business writing one would use "options" or "possibilities" instead of "avenues".