Dolfan085 ~ I admire your patience in trying to get your point across, but it seems you are not going to get your answers

I have been reading so many reviews daily for the N4 and I always wondered how come we don't see speedtests side by side on at&t and T-mobile. Especially from those who currently have the device, they bother by telling us how this is the best processor in market, but no actual data...
Good luck and please if you find an answer, come back and post it here
Speed tests are dependent on four factors:
1. What technology is being used? - this determines the theoretical maximum possible speed.
2. How big is the backbone network (the network behind the wireless network that actually gets you to the Internet)? - this determines the real-world maximum possible speed.
3. How many other people are on the same tower at the same time, and how saturated are both the wireless and backbone of that tower? - this determines your current available maximum speed.
4. How strong is your signal to the tower? Weaker signal and a lower signal-to-noise ratio decreases the size of the pipe you are pulling data through and can cause a need for packet resends.
The only meaningful nationwide test is #1, and we can already determine that from simple specifications on the network protocol being used. #2 depends on the carrier's effort into building good backbone, which will vary from location to location and sometimes even tower to tower. #3 will vary constantly. #4 may differ from place to place because if Carrier A's tower is 1/4 mile away and Carrier B's tower is 10 miles away, it'll skew the test.
The only way to compare is to send out hordes of people with different phones on different networks all reporting speed tests frequently, and the data will only be useful somewhere that a dozen people with a dozen different models of phone have all taken samples of all possible carriers over a length of time so temporary network congestion has a chance to show up.
Taking the same phone and testing two carriers on it side-by-side is only meaningful in that spot, and only if you know the signal strengths are pretty even and the tower congestion is typical for that carrier at that tower. Move 5 miles in one direction, and the test you just did is probably meaningless.
Only Sensorly, OpenSignalMaps, and similar projects are attempting to collect data at the type of scale necessary to vet out real-world network performance metrics, and not enough people care enough to gather data for them, despite the really cool collection tools each group provides. Most of the data for Verizon in my area was collected by me, and data for most other carriers simply does not exist where I live. Everyone wants the data, but so few people actually contribute the minimal effort necessary to help collect it (install an app and let it run while you drive around).