If we consider only an aspect of meaning, there are no differences in the sentences. это звучит нормально?

@bruv "This was one aspect of her character he hadn't seen before." Okay so now the word "aspect" actually fits better into this sentence.

However, for the other sentence, it's not natural to put such a huge vocabulary word into a simple sentence...you know what I mean? Also, sometimes the word may have a deep meaning than what you intended it to be. For example, what sounds better:

"I attended the bathroom."
"I went to the bathroom."

Do you see how "attend" and "went" can have the same meaning but it seems much more simpler and easier to use went? Attend is a more complex word, and it should be used for a more complex sentence. For example, what is better,

"I attended my boss's meetings and completed all her errands."
"I went to my boss's meetings and completed all her meetings."

I hope I made sense.