User blog comment:TheDoctor230/Barry Hasn't Defeated a Big Bad Yet (Technically)/@comment-26537965-20180110135435/@comment-24152851-20180111233533

Post-Flashpoint Thawne is Thawne, but not the same Thawne, there are two Thawnes coexisting at once. But unlike Savitar, Thawne's remnant still considers himself the same person. Savitar denied his past as Barry, made himself into another person. It's like Rorschach stating Walter Kovacs died on the night he failed to save the little girl and from there on our was only Rorschach.

Killer Frost is a split personality which is a whole different debate on if they're the same person or not, and entirely different from time remnants.