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These have some cast in common- XNK3731 through 3734 all appear in Stoss mich Baby... . By elimination Lydia [3]'s alias in Toilette must be Wild Cherry, as she is absent from Stoss mich Baby... .
The latter also has: Aldana, Roxane, Tanja [? =Tanja Love from Toilette] and the 'Go-Go Girls' [Non-sex] Tabea and Nicci.
Applying a little onomastic cod-psychology I'd guess that the 'catwoman' XNK3734 might be Nicci Cat [geddit ?]- screencap with eyes open: . She's like a younger version of Lexi Blank but only wears a navel-piercing; her areolae are dark brown and diffuse, her breasts smallish but larger than Lexi's were pre-enhancement.

Stoss mich Baby, Ich will spritzen [Maximum Perversum: as Sexo Extremo Poder Absoluto, Papillon]
1) 'Go-Go Girls': [non-sex];
/// and
//;
2) XNK3733 [who incidentally has a Kanji tattoo on her right buttock]- b/g;
3) XNK3732 watches a clip of herself being fisted by XNK3731 and then has anal sex with Conny Dachs;
4) XNK3734- anal;
5) XNK3731- b/g;
6) XNK3733- BJ;
7) XNK3733 fists a shortish black-haired leggy girl:
/;
8) Latina- anal, half-fisted by male who then urinates in her face:
/;
9) XNK3733- anal.
BTS: XNK3733 masturbates vigorously.

In Stoss mich are there both Tabea Bleue and Tabea, Nicci Cat and Nicci in the credits? That is, are the Go-go Girls credited as Tabea and Nicci?

Tabea [no surname given] and Nicci are credited as the 'Go-Go Girls'; Nicci Cat is credited separately.
The respective casts seem to conflict with each other. Again...

So the name Tabea Bleue does not appear at all in the credits?

No; only Tabea.

Thanks. Let me know if the notes against the performers fail to make sense after the next update.

I finally resorted to drawing up a matrix to try and resolve the inconsistencies, but without success.
They've cocked-up the respective credits, that's all.

...the XNK3731/3732 pairing resurfaces in Teeny Exzesse: Fick den Arsch Professor ! [Videorama, G87269: helpfully, the cover-art has the title Spritz mir ins Maul, which appears nowhere on the actual flick's credits !!].

There are only four girls present: the above duo, Marlene Cartier and a pink-tinted blonde whom I've seen nowhere else, 4WIW. The cast is: Tania Russo, Wild Cherry, Marlene Charrier and Sandy.
This suggests that for consistency's sake [well...up to a point, anyway] it might be better to attribute to XNK3731/3732 the names Wild Cherry and Tanja Love/Tania Russo, leaving Lydia [3]'s alias in 'Die Toilette' to be got from Claudia S/Beatrice X/Tabea Bleue or Nicci Cat.
I assume [for simplicity's sake if nothing else] Charrier is Marlene Cartier and Sandy is the unknown blonde.

The more I see of XNK3732 I see the more convinced I become that I've seen her elsewhere [Amanda Charles? Something like that ?]: curiously, in Fick den Arsch... she delivers her [albeit limited] dialogue in Mitteleuropa-accented but clear-enough English, especially to Tony di Serghio but also to Conny Dachs who, weirdly, replies in German. The rest of the cast speak German exclusively.

Thanks ... I think.

That's OK....I think.