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
Maybe typical in the lower compression depot, yep. Dog bone chamber in the hemi, isn't it? Somewhere in the polhemi