情怀: nostalgia, sentimental feelings 感情: emotion from a (romantic or non-romantic) relationship

For example, nostalgia or reminiscence can be interpreted as a kind of 情怀. It's a relatively abstract collection of 情感. Happiness, sadness and excitement are 情感. If you have an affair with somebody, you can also say love is a 情感 between you and your lover.

情怀:A sentimental mood 感情：As to person or thing has a profound emotion