If your concern is maintenance then it's all about the components. Generally one assumes a higher level of quality windlass (for example) on a production Swan or Oyster than a standard European Production boat. Still doesn't matter squat if the owner doesn't maintain it. Unfortunately a surveyor merely notes the presence of, and occasionally the operation of, a component - he/she can not tell beyond outwardly obvious cleanliness if a windlass/winch, etc. has been maintained.
Engine life is engine life and depends more on maintenance then make and model.
The hull and it's design are not large maintenance items, and if interior joinery is a issue because it's working to much (flex etc..) then it is what it is when you buy it.
All in all, newer should mean less maintenance in the short term, your results may vary depending on the variable number of variables
- i.e., really there is no answer beyond meaningless dribble so I'll just shut up.