I have every model locomotive, mostly MTH Premier, that I have purchased since re-entering the hobby 23 years ago. I buy models because I like them and, for me, I continue to like them even if the details, sounds or control system are "improved" in a higher-priced rerun. Whether a model has the latest features is irrelevant to me. I still run some very nice PS1 engines that I have operated for more than twenty years with no repairs required. They have delivered my money's worth.
I do think MTH has been much more innovative than Lionel in offering locomotive models that have not previously been offered elsewhere. Too many to list here but, among the New Haven Railroad examples are the EP-3, EF-3, Fairbanks-Morse CPA-24-5, Alco DL-109, and scale-sized GE 44-ton diesel.
MELGAR