3G and 4G CAN be the same. And they CAN be different. If you are going to compare two different phones to eachother, use the method described in the article to get an accurate signal strength measurement.
Similar, sure, but none of that is a way of predicting what it will do. Cell signal can change from one room to another, so it can certainly change with 150Mhz. (and different radio and tower).I don't have a picture but when i compared my Nexus with 4G OFF vs. a Droid X2 (non-LTE phone) it was a similar if not exact signal difference. I can post pictures tomorrow of my phone with just 3G then with 4G and you will see the signal dBm is pretty much the same.. I do know they are different radios.. and LTE is in the 700MHz band and in my area Verizon's CDMA (3G) network is on the 850Mhz band so the signal degradation would be pretty similar.. where Verizon operates it's 3G network in 1900MHz then the LTE signal should have a better coverage footprint based off same tower locations..
Instead of posting more photos of the Nexus, Post another side-by-side of the Nexus and the Bionic - but this time use the correct method of showing 4G signal strength described in the article. Lets call it independent verification of their experiment. They could be completely wrong, and you could be the one to prove them wrong!
I don't agree or disagree with that statement since I'm not walking around with two phones to compare them. Your method of testing it is flawed, however, and I linked to the article explaining exactly why and exactly how to correctly measure 4G signal strength on your phone to make a comparison. Whether you want to believe them or not is up to you - but I don't think they just fabricated the entire contents of the article.Simply put the Nexus does not receive as good a signal as other phones, 3G, or 4G