In terms of differences, eukaryotic cells are much larger and more complex than prokaryotic cells. On average, a typical eukaryotic cell is about 1,000 X larger in volume than a typical prokaryotic cell.
This means both drugs (amoxicillin and penicillin) can treat a wide variety of infections. However, unlike amoxicillin and penicillin, the routinely prescribed drug, metronidazole, has a more selective action towards anaerobic bacteria. These bacteria are the ones causing the signs and symptoms of bacterial vaginosis.
Procaine penicillin is an antibiotic that fights bacteria in your body. Procaine penicillin is used to treat many different types of infections caused by bacteria, including syphilis (a sexually transmitted disease). Do not use this medication for any other infection that has not been checked by your doctor.