Lilypond vs Petrucci, Round II

I said in the round one of this
comparison that I’d let you know if I got any useful
answers to my query on the lilypond list. One of the list
contributors got interested in the problem and wrote me a new
layout block that does indeed look a lot more like what Petrucci
does. You can read the gory details on the
list.

Pictures

Here’s the first page of the Petrucci facsimile of Adieu
mes amours by Josquin:

And here’s the cantus part lilypond produces now that I have
the new layout block:

And here’s the tenor part from lilypond with the new layout block: