Max Nairz 9./JG53 and Walter Manz 9/JG53

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From microfilms:

10/06/43=1 Marauder 15h45 20 km Cap Bon
11/07/43=1 Marauder 16h20 Catane

From Mediterranean air War vol.four (Shores and Co.):
Nothing about these two claims!

ON THE OTHER HAND:MAW vol.4
10/06/43:the claimant is Walter Manz=1 B-26 15h45 20km Cap Bon (missing microfilms!
11/07/43:the claimant is still Walter Manz=1 B-26 16h20 Catane (always missing microfilms).

What said J.Prien and his team about this?
What is the good version?...Max Nairz or Walter Manz?

Michel