Hi Qaiser,
Thanks for reaching out. If you would like to get detailed information for a specific ad you could use the AdService.get() to fetch values for different fields. Bearing in mind that creation date and duration time fields are not available. However, if you would want to compare performances of two different ads you would have to make a request to the Ad Performance Report to compare the metrics of the two ads and decide which is better to use.
I hope this helps. Please let me know if you have any further concerns.
Thanks and regards,
Xiaoming, Google Ads API Team