Do DxO PureRAW and DxO PhotoLab use the same demosaicing/denoising engine?

This information applies to version(s): 1, 2

Yes, the engine used within DxO PureRAW 1 is the same that is used for denoising in DxO PhotoLab 4.

Yes, the engine used within DxO PureRAW 2 is the same that is used for DxO PhotoLab 5 (faster DeepPRIME).