Błędnie: Their attitude to women's rights was so different to what I was used to, that it was difficult to start a reasonable dispute. Poprawnie: Their attitude to women's rights was so different from what I was used to, that it was difficult to start a reasonable dispute.
Przymiotnik "different" ('różny', 'inny') łączy się z przyimkiem "from"- "Różny od" to 'different from', np. Mary is different from her elder sister.