Help me pick between two choice for terms on my upcoming purchase
I am buying an 11 unit apartment building with a commercial mortgage and have the two following financing options:
(Both are 20% down, amortizing over 20 years). Purchase price $640,000
A) 4.25%, adjusting every 5 years
or
B) 4.625%, fixed for the first 7, then adjusts every 5 years
Please briefly explain your choice and thank you in advance!!