There is clearly an offering formula at work here, as evidenced by the exact groupings and position of certain glyphs, and their order in the sequence, from one stele to another. Three of the stele you provide begin in the same way and I can also read the phrase 'hsy'in all five stele, which means "praised one" (a group of five glyphs in the far left register beginning with the twisted flax and ending with the two reeds).
There is also commonality in phrasing with regard to other offering items between the stele in the middle and the one on the right: the oils (sntr) and offerings of "thousands" of "bread, beer and oils" (as indicated by the glyphs immediately to the right of the subjects' faces and beneath them the glyph which depicts the number 1,000 which you can see repeated under each of the offerings.) See here for clarification and cross reference:
Elsewhere there is commonality in the foods presented at the offering table between the stele: the heads of oryx and oxen are common to three of the five stele, while geese are added to the stele on the right.
What this verbal patterning across the five stele you provide serves to demonstrate is that by Dynasty 3 there appears to be an established offering formula and while some of it is familiar and instantly recognisable, other parts - such as the opening of the invocation - are quite different to the offering formula of Dynasty 4.
That should come as no surprise. One has only to think of how, in most traditions - music, art and literature spring readily to my mind - the next generation is often a departure from that which preceded it. Think rock 'n' roll to disco to punk in music, for example.
Edited 2 time(s). Last edit at 20-Dec-16 08:10 by eyeofhorus33.