This front cover of Q is taken entirely up by Dave Grohl, obviously telling us that he is the main featured artist in this issue. The readers of the magazine are going to be told that this issue is mainly on rock music. This is because Grohl takes up the who front cover, indicating that the magazine it's self will be taken up by rock. We can also tell it will be mainly rock because of the use of fire and black, which is conventional of hard rock. From the main image there is another indicating that Grohl is the main feature in the issue. This is the depiction of the other Foo Fighters members inside Grohl's mouth, which could tell us they're not as important as them.
We can also tell that the magazine aren't taking themselves too seriously. The main image it'self isn't meant to be artistic or innovative, instead it is playing around with hard rock conventions used previously by AC/DC, Areosmith, Zepplin etc...and having a joke with them.
This front cover makes it very clear what audience Q are trying to entice in. Q have used a picture of Dave Grohl, an icon in rock music, and next to it they have sell lines of Biffy Clyro and Arctic Monkeys who are also (the latter sort of) highly thought of in the rock world. There is also a small sell line about Radiohead. These sell lines along with the main image are clearly trying to entice fans of rock into reading this issue. This makes it so the audience almost doesn't see the Nicki Minaj sell line.
The fact that Minaj is in the same magazine as Foo Fighters and Biffy Clyro sums up the ideology of the magazine. Q is known for being very diverse in genres of music and likes to write articles about nearly all genres.
This Cover of NME is a lot different to other issues. Normally NME has red text, this issue has orange text. The orange links in with the main article and image which is about "The reinvention of Mark Ronson", the orange could connote that the reinvention is one of their liking.
The main image of the cover is Ronson holding two halves of a trumpet, telling us of his new sound. Before this issue came out, Ronson was known for covering well known tracks and putting horn sections on top of them. This image depicting him with a broken trumpet tells us this is no more without the audience having to read the anchorage.
The main article on the cover is conventional of NME. The NME are known for being very fond of innovative sounds and the changing of images of artists. The main article sums up the NME's ideology and therefore the main image sums up the magazines ideology.