Originally Posted by Gone Flying

Our contract was set up a little different. When we had our JCBA our 737/738 was paid at a higher rate than our 320/319. As I understand it your 319/737 rate was based off our 319/320 rate and your 320/738 rate was based on our 737 7/8 rate. When we brought the 739 on property we negotiated a (slightly) higher pay rate for it in between the existing 737NG rate and our 757/767 rate. That rate then applied to the A321CEO. We were able to get 757/767 pay for the 321NEO. This contract would bring up 319/320 to the 738 pay rate.

TL;DR our 739 pays more, not necessarily our 738 paying less if that makes sense.