Relationships or Sambandh is an important factor that most ignore while evaluating the horoscope. The difference between aspect and relation or Sambandh is that aspect is an influence while the relationship is a mutual influence that the related planets exert on each other.
Sage Prashara has Maintained that there are four kinds of Sambandh1)Mutual exchange
2)Mutual aspect
3)Conjunction
4) The Depositor aspects the other planet sitting in its own house.
Mantereshwar the author of Phaldeepika describes 5 types of relations.
1)Conjunction
2)mutual exchange
3)Mutual aspect
The additional two relations as per Mantereshwar are
4) Kendra Sambandh- Planets are related if they are in 4,7,10 from each other
5) Trikona Sambandh- Planets are related if they are 5,9 from each other.
An aspect is an influence of the planet that casts an aspect on the other planet its intention is to control or manipulate the consequences.
A Sambandh or relationship is a mutual absorption of energies of planets here the planets influence each other.