Interior doors: hollow core vs. solid core vs. middle layer with strip board

Hello everyone,

we are currently stuck a bit with the selection of the 12 white interior doors (4 basement, 8 ground floor and upper floor). We have obtained different offers, which vary significantly (for the basement the cheaper doors, for the ground floor and upper floor the more expensive doors):

Offer 1 (Sühac):

[*]Interior door CPL White 40 + frame CPL white lacquer round 1985 x 860 x 185 mm, core: hollow core: 230 €
[*]Interior door CPL white lacquer 9010 + frame CPL white lacquer round 1985 x 860 x 185 mm, core: solid core: 335 €

Offer 2:

[*]Room door element consisting of door leaf rebated with hollow core panels and wooden frame including rebate and decorative cover with round edge, 2-part, maintenance-free hinges with nickel-plated surface, BB lock with noise-reducing plastic latch; surface plastic-coated CPL - color selection from current color collection, optional grain vertical or horizontal: frame depth up to 27 cm Size: W: 885 mm x H: 2010 mm: 325 €
[*]- Model ZT 85 - - Joiner doors - in-house production - room doors opaque white lacquered, smooth, RAL 9010, core with engineered wood panel, door leaf and coverings with solid wood builders and milled rounding; size: W: 885 mm x H: 2135 mm: 780 €

Offer 3 (Köhnlein):

[*]Size: 860 x 1985 mm, frame: FT-standard frame board edge straight, coverings angular 60 x 22 mm; door leaf: FT-standard hollow core core, straight edges: white lacquer semi-matte: 481 €
[*]Size: 860 x 1985 mm, frame: FT-standard frame board edge straight, coverings angular 60 x 22 mm; door leaf: FT-standard solid core, straight edges: white lacquer semi-matte: 526 €

Prices are each net and without installation. Installation would be about 100 € per door extra.

Except for the joiner door from Offer 2, none have factory-assembled and overpainted frame. In Offer 3, this could optionally be done for 195 € net per door extra. Not possible in Offers 1 and 2.

Can you assess the quality of the offers?
Naively, I thought that a door with solid core is up to 50 € more expensive than a hollow core door. But what is the value of a core with engineered wood panel?
Which offer would you choose?

For 12 doors, our offer varies by several thousand euros.

Many thanks and best regards
Peter

But what is the worth of a middle layer with a rod plate?

Classic (high-quality) joiner variant. Worth a lot, as it is very solid. My choice: 1. Joiner variant (although really expensive!) 2. Köhnlein solid chipboard 3. Köhnlein tubular chipboard CPL is out of the question for my own house. Painted is already a nicer, although more expensive appearance.

Interior doors: hollow core vs. solid core vs. middle layer with rod panel

"Everything has already been said, just not by everyone" ? How many solid core vs. hollow core threads do you think are needed, can maybe only my "typewriter generation" also use the search function in internet forums?