I need schooling - old vs. new engines

Very difficult to compare the two since the engine designs are completely different. Even though a 3G is not a "true hemi" it is still a hemi design, not a wedge. Football to baseball and all that

For example, I was astounded a few years ago to find that a 3G hemi only wants low 20's for total advance, while a typical wedge wants 35 ish and in some cases more than that