Both of these verbs are used for asking about something or looking for information. The nouns for the request / investigation are enquiry and inquiry.
Technically, enquire is used for "ask" in general ("He enquired about prices for the products"), and inquire for a more formal investigation ("The police will make an inquiry into the alleged corruption.")
However, in American English it is now very common to use inquire for everything: "He inquired about prices for the products."
This just doesnt seem right. Bryan the opposite of Ryback in size ability and crowd appeal makes just a small amount more. The WWE however did listen to the loud cries of the tortured fan base providing a fantastic WrestleMania moment for Bryan and the YESnation last year. The company also had him headline with Reigns at Fastlane but he has now been saddled with the Intercontinental title hopefully for the purpose of bringing prestige back to the belt oops title sorry Vince.
It feels like the WWE thinks that perhaps Bryans chant is more popular than he is.