the 5.3 and 6.2 feel very different from 5.7..less rpm swing possibly..i love my 5.3, the pull feels so much more consistant.. @MISkier the 2015 did not have a 5.3 or 6.2, so it would feel different..if it was a 5.7, very different, if it was 6L, that's closer to the 5.3 by feel