Archaea and Bacteria are prokaryotic domains. They're comparable but different. Archaea and Bacteria differ in genetics, cell shape, metabolic processes, and ecology. Bacteria are present everywhere, but Archaea flourish in severe settings like hot springs, acidic lakes, and deep-sea hydrothermal vents. Archaea have unique cell membrane architectures and enzymes to withstand severe circumstances. Archaea's evolutionary history is closer to Eukarya than Bacteria's.