My dad had gone to Singapore and he bought me the T1 from there.
In my opinion, the T1 has better tonal density in the midrange and better mid-treble integration at all volumes.
The AKG has a leaner, yet flatter and more transparent midrange (other than an upper mid-boost which the AKG has and the T1 does not.) So, mid-treble integration is worse on the AKG.
The AKG has much less bass impact but far better bass control and texture. Mid-bass texture is greater on the K-702, which it achieves with a sense of dryness to the sound.
The T1 is very fun to listen to, but when it comes to ultimate bass resolution, texture and control, the AKG wins easy. (The T1 has much greater bass impact again, making it fun to listen to.)
Detail retrieval wise, the difference is not great and the AKG and Beyer are both outstanding. Some details stand out on the AKG and some on the Beyer.
But the biggest wins the AKG score are in imaging, soundstaging, treble extension and finesse.
The details which the AKG bring out seem to be placed at the correct positions on the soundstage, whereas the Beyer is more 'in-your-head'.
And the K-702 soundstage is much bigger and imaging is pin-sharp... you know where exactly the detail is coming from.
This is from my experience with the K-702 on the Burson HA-160 and the Beyer T1 on the Headroom Ultra Micro. (The Burson does not sound right with the Beyer, IMO)
the K-702 is a very, very finicky phone, but drive it out of the Burson HA-160 and your jaws will drop.
Both are great phones, but they trade their strengths and weaknesses.
This is not AKG-fanboyism, just my honest impressions.