No. There are a limited number of insurance companies that will insure aviation risks. Several “carriers” are actually groups of companies. Because of that, your best option is to work with a specialist aviation broker who can explain the differences. The relative financial strength of the carrier is very important as it reflects their ability to pay claims.
In addition, different underwriters will be stronger on various types of risks. Also, the way in which claims are settled can vary. Your aviation insurance broker specialist can help you make the best decision.