The specific difference between the "Gaming chair ROG Destrier Ergo Core" and the "ROG Destrier" (without core) can be summarised as follows:

## Material and frame
- The ROG Destrier Ergo Core has a nylon frame and a metal base, while the ROG Destrier has a mesh frame and a die-cast aluminium base.

## Mechanism and tilt
- The ROG Destrier Ergo Core has a three-level tilt, while the ROG Destrier has a four-level tilt.

## Maximum tilt angle
- The ROG Destrier Ergo Core can be tilted up to 125°, unlike the ROG Destrier which can be tilted up to 135°.

## Maximum weight
- The ROG Destrier Ergo Core supports a maximum weight of 150kg, while the ROG Destrier supports a maximum weight of 136kg.

## Overall customisability
- Both chairs offer a high level of customisability, however the specific customisation options vary slightly, particularly in terms of tilt and materials.

These differences mainly concern the materials, the tilt functions and the maximum weight, which each address different user needs and preferences.

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I'm also thinking about whether destrier or destrier Core