Accords and Preludes have always been pretty similar in terms of mechanicals.

One thing to keep in mind about the latest versions of things based off the "Accord" platform is that it's actually this thing called a global midsize architecture. Even though it's supposedly the same thing in all these different cars (three versions of Accord sedan including the TSX, the USDM Accord coupe, Odyssey/Lagreat, Pilot and MDX) Honda is able to change things up like wheelbase and track to create different sized vehicles from essentially the same parts bin.

Oh and the 6th gen Accord was built on an older version of this global midsize architecture, while the 5th gen Prelude was built on an evolution of the 4th gen Prelude which shared most of its parts with the 5th gen Accord.