Ate, ang calcium content ay different talaga, one has 600mg, one has 500mg, kaya hindi sila magkapareho! But more importantly, please check with your OB muna kung alin ang better para sa iyo at sa baby mo, lalo na 7 months preggy ka na. A few of my mum friends nag-tanong din ng ganito sa kanilang doctors kasi important ang tamang dosage during pregnancy. Your OB can recommend what's safest for you specifically based on your diet and needs. Don't hesitate to ask, yan ang trabaho nila, and they'll explain it clearly!