Homeric Scholia: Erbse vs Nicole

[njmolinari]

I noticed today that Erbse combines the Venetus A and Genevensis scholia in the case below. My question is, why would he do that?

Erbse (Scholia A and Ge) :

Ariston.
οὐδὲ βαθυρρείταο <μέγα σθένος Ὠκεανοῖο>: ὅτι
Ζηνόδοτος αὐτὸν οὐκ ἔγραφεν· γίνεται γὰρ ὁ Ἀχελῷος πηγὴ τῶν
ἄλλων πάντων. ἔστι δὲ καθ’ Ὅμηρον ὁ Ὠκεανὸς ὁ ἐπιδιδοὺς πᾶσι τὰ
ῥεύματα· διὸ καὶ κατὰ τιμήν φησιν· „οὔτε τις οὖν ποταμῶν ἀπέην
νόσφ’ Ὠκεανοῖο“ (Υ 7). A Ge

The scholium in Ge is as follows (ed. Nicole):

Scholia in Iliadem 21.195bis1-4

Ἀριστόνικος ὅτι Ζηνόδοτος οὐ γράφει τὸν στίχον· γίνεται δὲ
Ἀχελῷος πηγὴ τῶν ἄλλων πάντων.
ὅτι καθ’ Ὅμηρον Ὠκεανός ἐστιν <ὁ> ἐπιδιδοὺς πᾶσι τὰ ῥεύματα.
διὸ καὶ κατὰ τιμήν· «οὔτε τις οὖν ποταμῶν ἀπέην νόσφ’ Ὠκεανοῖο»

[mwh]

Why? To avoid excessive duplication. They’re really one and the same note.