Original research: So turn out the one with bigger eyes thing have moulted more times (not just older but also they have to catch enough preys as i seen a Physocyclus Globosus daughter moulted much sooner than her mother, but after some months the mother catched a huge prey and moulted just a day after that)
Sorry i can't upload the photo i took because i don't want to be doxxed but i've collected some moulted skin and will took a photo of it soon
thanks everyone
edit 20241103
WAIT no the one with bigger "eyes", longer legs and smaller abdomen are male