I actually had to re-read tekins website, your statement of doesnt tell the whole story. Tekin's press blast say which is from 1 point to another, not each change in degree of .2 is a change in value. It makes no mention of the resolution, which is what i was trying to compare, to get an apples to apples comparison.
That's not what that means at all... It means if you command 30.0 degrees, it will be within 0.2. If you command 90.0 degrees, it will be within 0.2. If you command 180.0 degrees, it will be within 0.2.
So I'm going to stick to my original point, we know Savox is 1 change in value per .0488 degree of movement. I would be interested to see what Tekin's is.
I give up. That's not how it works. Knowing the servo is off by 0.0488 degrees doesn't mean it is capable of correcting that small of an angle. there is more play in the driveline than that. All servos have a set amount of deadband to prevent the servo from hyperventilating trying to match the input angle with the output. Put a super long (so it is easy to measure) and super rigid servo horn on a brand new Savox servo. Weld/glue/braze/epoxy the horn to the output shaft so there is no play. Bolt the servo to a table. Turn on the radio and then push against the servo servo horn one way. Measure the angle it sits at. Push it the other way. Measure that angle. The difference will not be .0488 degrees. It will be much larger.
To your point resolution vs accuracy, resolution allows us to be more accurate to a certain point and come on, we both know Tekin and savox have some kind of temperature correction factor built into the Micro controller. Hall effect sensors are sensitive to changes in temperature as well.
Wait, you demanded proof for my claims, but we both know there is a temp sensor in savox servos and a profile stored that perfectly compensates for temperature, age, cycles, and all the other factors that affect the accuracy of a potentiometer? 
Temperature has no effect on the accuracy of a digital encoder (as long as it is within operational limits). It affects analog systems like potentiometers. Digital encoders of any sort (magnetic, light, etc) produce the same accuracy. That's the whole point to using them. They work by producing multiple pulses as the encoder rotates that the processor literally counts to tell where the encoder is oriented.
I will concede after re-reading your statement you didnt claim Tekin had better gears and better response time, however you mentioned it would effect price, which was specifically what I was asking about. You kinda lead people to think the increase price tag over something like a savox
could be because of those things. Thats a little misleading, along the same lines of drinking commercials. "Drink our beer and cool people want you".
You asked how they could justify the cost. I listed possibilities that apply to all servos, not just Tekin. Then I listed things that are for sure better spec'd on the Tekin units. I'm not sure how else I could have worded it to avoid confusion.
Actually all of those features are already included in the servo, except the torque change on impact. That would be interesting to see in action, I would think some kind of accelometer and/or G-force meter would need to be used.