As a language model, please analyze and compare the performance of machines in the manufacturing domain, considering the provided data. 
Summarize the information without providing a point-wise analysis.

downtime_events = {"M1": {
    "name": "alignment delta",
    "frequency": 9,
    "duration": 10.7},
                        {
    "name": "low power",
    "frequency": 7,
    "duration": 7.6},
} Please use JSON format in your answer.
user