I have both a SP10MKII and a DP75. The Denon arrived needing some service, and I recently got it back but have not yet mounted it with a plinth and tonearm. The Technics has been a workhorse for me--other than some caps in the power supply needing replacing it has just been spinning for me for 20 years without complaint. It will be interesting to see if I really hear a difference between the two (but they will have different arms so not a scientifically valid test!) and if so, will I have a preference?
I bought the Technics back when they were cheap, and the Denon last year from Japan on a whim (relatively inexpensive compared to both the usual USA price and what the SP10's now go for.) I appreciate the no nonsense build of the Technics--it is professional tool meant for hard service and to be serviced. It can probably be your last turntable with no complaint; it should have been mine, but somehow I manage to keep collecting more. The Denon seems likely to be more hifi-ish in its demands on the owner. If I like it and it keeps working, it will be quite a good deal as near TOTL for under $1,000 with plinth (DK-2000) and tonearm (Fidelity Research FR-54.) If not, it will be an impressive door stop.