Sound perspective? I don't, I believe TOTL headphones with TOTL systems kick harder than TOTL C/IEMs with TOTAL systems. Is the difference day and night? I doubt it, but by their physical structure, headphones bound to give a better presentation.
However if I take your question as general, overall I prefer c/iems (not even universal iems) because of their advantages. All systems have their advantages and disadvantages. Ciems give the things that I value most, so I chose that path.