Which contraceptive pills turn out to be better depends on the individual characteristics and health of the patient.

Belara contains ethinylestradiol and chlormadinone. Chlormadinone is a progestin with antiandrogenic properties, so it can be helpful in the treatment of symptoms such as acne or hirsutism (hirsutism).

https://www.gdziepolek.pl/produkty/9841/belara-tabletki-powlekane/ulotka

Syndi contains ethinylestradiol and cyproterone. Cyproterone, like chlormadinone, is a progestin with anti-androgenic effects, but it is more potent. For this reason, Syndi is often preferred by women with more serious skin problems (e.g. severe acne, seborrhea) or associated with excess androgens (e.g. hirsutism).

https://www.gdziepolek.pl/produkty/76481/syndi-35-drazetki/ulotka

These pills have a similar overall risk of side effects, such as headache, mood swings, and an increased risk of blood clots, but Syndi can have a greater effect on hormonal balance, which can lead to greater changes in libido or mood levels.

I have attached helpful materials:

https://www.gdziepolek.pl/kategorie/tabletki-antykoncepcyjne-dwuskladnikowe

https://www.gdziepolek.pl/blog/historia-antykoncepcji-metody-zapobiegania-ciazy-kiedys-i-dzis