Why the core matters more here
On a traditional design the mouldings are the whole point, and mouldings need depth. A foam filled leaf can only take a relatively shallow pressing, which is fine at a distance but obvious close up. Solidor's 48mm timber core can be machined into properly, so the panels have genuine relief and a real shadow line.
If you are fitting a panelled door to a period property and you care about the detail, that is the argument for spending more. On a plainer design it matters far less.
