Where they overlap
Three points where all four rely on the same material. An organisation that keeps them as one source reports; one that keeps them apart transcribes.
Where the data protection authority has already imposed an administrative fine under the GDPR for a personal data breach arising from the same conduct, no misdemeanour charge or order may be issued under the Cybersecurity Act for that same conduct. The obligations remain separate, but the same act is not punished twice.
The penalty figures are the upper limits set by each instrument. The actual amount depends on the circumstances each instrument lists - the seriousness and duration of the breach, intent or negligence, measures taken, and the level of cooperation with the authority. This is an informative overview, not legal advice.