Using any chart or recommendation, the smart thing to do is shoot a roll with half stop brackets in multiple lighting situations, try the developer's own suggested time and/or the chart, inspect closely with a loupe, see which frames look best in which situations...look at highlight and shadow detail.
My outdoor light is usually maximum contrasty...desert, 5,200'..I want go0d highlights and shadow detail...my chosen ei/processing would logically be expected to be different from some European's, shooting at sea-level with a usually-overcast sky...
If I wasn't scanning/inkjetting (which likes normal and low contrast negs) I'd probably want a more contrasty neg in Germany than here...but Emofin doesn't readily produce contrast, in my experience...so maybe I would follow the chart... I don't know modern TriX, but doubt the German chart time would produce a black neg (I like Emofin 6/6 with Neopan 400, rating normally at 800-1600 (meter @800, be very happy with a stop less when I want faster shutter).. but I'm divorcing everything for R-09, 1:80, true stand processed one hour).