I had owned an SR-838 during the 80's and I thought it was a great turntable, well designed, build quality was excellent and really nothing bad to say! They had a nice piano black finish too.
The motor was fairly tough and very quiet, which I really liked. I remembered i owned a Rotel direct drive and sold it to buy the Sansui 838. If I remember right, you could actually change the ToneArm on them if you wernt happy with the factory one. the factory arm was fairly decent, and very low in mass.
The Technics Sl-1600 however, may have been considered "Mid-Line", it had better figures in WOW and Flutter, than the Sansui which isnt noticable anyways, and a lower mass tonearm (which the 1200 uses as well) then the Sansui. In the grand scheme of it all , Both are a Win and Id say the 838 for that good sound and classy looks. SL-1600 for Good sound and that futuristic 80's feel! LOL!
I had used a Sumiko Cart on that SR-838 and boy did it ever sound great!