Hello!
I just wanted to thank you for adding both Shift and Legacy to your reading list! I'm honoured that you'd give them such a chance, and I really hope you'll enjoy the reads!
Also, I just read your idea for a story that you posted yesterday, and I think it sounds great idea! Soul mate stories (especially seeing that you've twisted it around to make it unwilling) really make for an interesting read.
With your title options, however, they both really suit the theme, but I just did a quick search and there were 195k results that came up under the title of option 1, where as there were only 29.6k for option 2.
Now... I know I'm not exactly qualified to speak about using original titles (What with my one-word cliches :D) But I just thought I'd suggest to try to opt for the one that's less frequently used, so that it doesn't get lost amongst the rest of them! I've just read somewhere that it'll help your story stick out to the browsing reader!
Of course it's always up to you, and those are great titles you've selected, already! Just thought I'd throw in my two cents, to see if I could help a fellow writer!
Good luck with your writing and I hope you have a wonderful day!
Regards,
Eagle