Depends what you use...
GSM arena is testing with full size headphones, so they won't give you any informations about the output impedance, which is kinda important for in-ears (with more than 1 drivers), but not important for full size headphones.
About whathifi, if you mean this: http://www.whathifi.com/review/sony-xperia-z2
Well sorry but... This "Review" is totally crap.
As with past Xperia smartphones, the Z2 makes Android rivals sound pedestrian with its punchy, engaging sound. Strong dynamics, solid bass, plenty of detail – the Z2 has it all.
And the bass on every other phone is not solid, plenty of details, or strong dynamics? More informations, more comparisons please, or reading that review is a waste of time.
Listening to Bastille’s The Rip Tide
through our B&W P7
reference headphones, timing is precise, vocals are clear and instruments have room to breathe.
B&W are kinda designer-headphones, and should not be worth their money... They do not offer "300 dollar sound". Using something like that as reference.... not a good choice.
There are plenty of other headphones.
And since these are mobile devices, and most people who listen music are using inears, they should use a multi-BA driver inear as reference, comparing it to a "reference"-USB DAC/Amp, which has 0.1 Ohm output impedance.
Everything else... nope, not really informative.
Headphones like that, you can plug them into 99% of any smartphone on the market, and say "wow strong dynamics, solid bass, plenty of detail".
Call quality is also good on the Z2, with the Sony speakers sounding clear.
I heared alot people complain about the call quality, beeing worse than on the other 2014 flagships.
Soo... In my opinion, thats not worth beeing called an "Audio Review". Better look somewhere else, of better: try finding user who have tested it, and maybe measured.
Edit: If you ONLY look at the Audio part of the Mobile phone, gsm arena tested it like a million times better, than whathifi, which is more... well.. an amateur who dont know what hes talking about, and how to properly test Audio. Because this is wrong.
I can not see how anyone could possibly go with what-hifi (regarding the Xperia Z2 test only), if they give you ZERO information about the audio quality.
I mean... Is the xperia Z2 now better or worse than the M8 or Galaxy S5? The most important question, not answered.
I expect more from "experts".
Edited by Darkseth - 6/4/14 at 7:48am