Also, how do Rhajat and Touka overlap each other? They seem pretty different and I don't recall them having any similarities.
Of course, there's nothing to compare when it comes to the romancing dialogues (beside the obvious creepiness and obsession.) Touka isn't 'romanced' ever either in her own series. I know other versions might have made her sound slightly different, but the least I know in her original dialogues there's a very subtle, certain kindness behind her docile yet beyond-your-reach(?) kinda tone, the same feel I get from Touka (late in the first series and early RE despite her lack of appearance) (it's like she's actually kind and cares about certain things/people but you know there's a another world in her when they show that side of them, despite the very different portrayal of this quality in their respective stories). There's also their 'lonely' nature shown at certain points in their respective series, while the presentation is also quite different (maybe due to the presence of the Anteiku community in terms Touka,) it does appeal to me in a similar manner when it comes down to it. It's the same 'lone-wolf' feel before they meet the ones that open up their heart, untamed yet mild and surprisingly you could actutally strike a conversation with them, especially when you compare the reason for which they isolate themselves at one point or another.
But yeah beyond these few tertiary qualities there isn't really too much cos on the surface the sort of words they use in their dialogues are just too different. But I'm jusst nitpicking partly to justify my Touka vote cos while I hesitated choosing between Touka and Camilla, I wouldn't be as much if it were Shara and Camilla due to personal preferencess