I guess my opinion and observations are limited strictly to SPS. I've never kept zoas or other colorful LPS. I found growth the same with LED vs T5, but color tones of SPS display better with T5. In Rich's tank, it wasn't a matter of opinion at all, one piece in particular was a solid color under LED, about 5 different tones under the T5. I found, with the same piece, I got the same results when going to T5. Yes, I miss some of the function of LED, although spectrum isn't one of them. Once set, I left it at a color I found pleasing. Dimming would be a nice feature to have back though.
All that being said, if I could, I would go back to MH if I could manage the evaporation
