Home Internet - 4G LTE vs 5G

My primary is B66 with 2 bars and my secondary is N41 with 3 bars. Download speeds are fantastic.  The lowest I have seen is 200 megabits.  It is 310 megabits many times.  The upload speed is between 7-10 megabits.

Why aren't primary and secondary the other way around?  Should I be getting faster upload speeds?  I am less than 1,000  feet from a T-Mobile tower.  The elevations are about the same but there are a couple buildings in between.

10 days and it has been very good.  Xfinity is now cancelled.