Reading people's thoughts over on XDA and other forums plus the comments regarding the gsmarena article and quite a few people also think that gsmarena were rather bias towards the GS 4.
One guy posted something along the same lines as what I did earlier:
and then funnily enough, you go to the galaxy S3 and have a look at all the articles there are for it and then compare to every other phone
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IMO they really have gone downhill in the last year or two, their reviews are still very good and give you a great idea as to what the phone will be like overall but in terms of quality for the written part, it is pretty poor when compared to the likes of anandtech etc.
One guy posted something along the same lines as what I did earlier:
I think the GSMArena takes manipulation of the mind to the level an art (like others do too), the way they twist some characterstics to seem like advantages and then go completely the other way around when it comes to others. Even when they give high praise to a phone's characteristic they can make it so that you feel like the other one is even better. It is an art which is played mostly at an subconscious level.
In the end it's not a conspiracy, it is problably just a need for good web traffic=money and they can make it so by praising the dominant company. There are probably dozens of millions of Samsung users and it is better to make them think and be at ease with the Samsung product they have chosen, being gratified with the fact that they are on the best side - its just a mind calming factor + gets your site lots of mouse clicks.
S4 is a beast but for me the qualities i seek in a phone put the HTC One on top and the S4 problably not even second.
and then funnily enough, you go to the galaxy S3 and have a look at all the articles there are for it and then compare to every other phone
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IMO they really have gone downhill in the last year or two, their reviews are still very good and give you a great idea as to what the phone will be like overall but in terms of quality for the written part, it is pretty poor when compared to the likes of anandtech etc.