They are surprisingly similar. With the Seadweller on the wrist I soon forget about the TC and could very well live with just the SD.
It´s when You put them side by side that the TC: is thinner and slim in design, sits lower on the wrist and the TC dial is quite
superior in shine, depth of the black and polishing of the dot markers, reflection, quality of the lettering on the dial.
You can go into a length of subtilities and details of course, it´s just that in real life the 2 main differences above are the only really
noticeable ones to me.
As said, 10 minutes later and without a comparison/ reference point the brain "forgets" about it and imho the SD does very well.
TC (ok, given, mine is the Seadweller-look version
BP
side by side