Hi,
you need to know, that the 7024 was released after the 7030. So the 7024 is a newer model then the 7030.
The 7030 has 8x RJ-45 and 8x SFP. One Example:
You are using ethernet 0/0/0 (RJ45), you cant use ethernet 0/0/0 (SFP).
You are using ethernet 0/0/1 (SFP), you cant use ethernet 0/0/1 (RJ45).
Summary: There are two physical ports RJ45 and SFP, but both are combined through the software. You can decide if you want to use RJ45 or SFP (comboport).