I really wish there was a little more clarity with terms like "better/stronger", "stable structures"
. Does that mean stable handling & road-holding? Or are we talking about the degree of stress analysis carried out on the structure (monocoque in this case) to assure torsional rigidity, durability & ruggedness? In the former, the suspension fine tuning would assure whether the vehicle has stable handling. Most European mfrs (including Ford & VW) have established themselves in this regard via the motor sports route, where they have participated actively over the years & incorporated the feedback into their road-going offerings. TML on the other hand is a bit of a johnny-come-lately, but with the JLR acquisition, their RD portfolio - including Jaguar's formidable sporting reputation - makes them equally fair contenders for the handling/road-holding trophy.
As far as structural strength goes, I feel, that with the degree of sophistication & industrial osmosis prevailing in the industry, it is mostly individual mfrs who decide how much cost cutting can be indulged in to offer reasonable "stability". And here again, my money would be on TML, for no other reason than TML's efforts to stick to best industry & segment standards.
Where in-cabin quality (plastics, leather, gadgetry & other frills) is concerned, I'm sure TML is catching up fast & should be up there with best soon.