Yes, I totally, 100% agree on the quick diffs of Arrma.
The other thing that I miss with Arrma when I work on my MT410 and SCT410.3 is that with Arrma the motor pinion is by the ESC and the motor hangs out the back. With Tekno the pinion is at the rear and the motor hangs towards the front, right by the ESC. So basically a 4074 is the largest motor that you can get in the Tekno without custom mounting the ESC where you can get a long can in the Kraton with stock mounting locations. I also believe that getting a larger ESC in the Arrma is easier as well.
From what I have been told by people that own both, when stock, the Tekno, hands down is better/stronger than the Arrma. But when both are fully upgraded with aftermarket parts that the Arrma is a little stronger. Mine are still mostly stock, and I can say that the Tekno is the better performer and stronger out of the box.
@Slicktmi I have upgraded the plastic shock caps and servo horn before I even finished assembly but the plastic spur is still going strong.