I have almost the same situation. 2 nodes on the same physical server, started at the same time, share the same IP address, has the same size and working each on dedicated disk of the same model (and probably even from the same batch).
One node systematically gets 2x total ingress than another at least since SLC tests were finished. The difference is mainly because of EU1 (7.5x) and AP1 (4.5x) satellites. Ingress from US1 is almost 1:1.
May be there is some bug in new node choice algorithm?
P.S. Node location - EU.