I don't think anything about the clothes is indicative of a specific chassidik group. I think that religious Litvaks (Lithuanian or generally non-chassidik) would dress similarly. (For example there is a famous picture of Rabbi Boruch Ber Lebowitz who was one of the big Rabbis in Lithuania and his dress is quite similar.)
Knowing the area they were from, their customs, their accents, or even their names would be able to provide clues as to whether they belonged to any chassidik group.
SPIELER Lodz, Zloczew, Belchatow
SEGALL, SCHWARTZ Piatra Neamt