from your first linky
"The upgraded network platform could allow for theoretical peak download speeds of 7.2Mbps (actual speeds may vary depending on a number of factors, including location, device, and overall traffic on the local network at a given time)."
notice keywords "could" and "theoretical". as the networks stand currently, i am not wrong. also, yes...what phone you are using does play a part in speeds. however, coverage is also a concern. please notice the differences in coverage area between the two companies. thanks for the info though.
p.s. thank you for providing proof without being prompted to do so. i hate unsupported arguments.
will click thanks for proof!