Hi

From the details provided the conclusion is that there can be status difference between the families .Vedic astrological compatibility is less .For happy married life 28 and above guna are necessary.

But married life will be just Ok. As only 24 gunas are matching.

Mercury in venus star vs mercury in sun star. One person will be more confidant and proud in his thinking than the other person.

Adjustment will be necessary as moon are in mutual 2/12 in both the charts.

Besides as ketu is star lord of marriage house in one chart- this person can have unpredictable behavior and more desires compared to the person having Jupiter connection with house 7.

And ,their mentalities will not be matching.

Hence its advisable to look for better astrologically compatible matches for your sister.

satish