2013 ctsv spark timing vs 2013 ZL1 spark timing

Have you guys every compared the stock tune between these two cars? The ZL1 has a much more aggressive table in the mid range area than the ctsv does. I know the iat adder tables are more aggressive on the V than the ZL1, but they are drastically different. Anyone share some insight as to why they are so different? Anyone with a V try and running a similar spark timing in the mid range area? Just curious as to why the same engine has such a different spark table

Damn, nobody has any explanation as to why they are so different? I know they have different lids, but I wouldn't think that would have made that much of a difference..

So we can never know why they did what they did. Best guess. Fuel type. I do not have the owners manual. What does it say for required fuel.