Never like the Blessed Sacrament!! To the Blessed Sacrament, really our Lord, we offer the cult of
latria reserved to God alone.
A blessed crucifix is - in my words - consecrated to God, and can allow us to merit indulgences given through the power of the Keys (remission of temporal punishment, that is).
Kneeling before it is one pious practice

One can contemplate the Lord in it represented, meditate on His passion, pray to Him who the crucifix represents, and other pious practices (a kiss to the Holy Wounds is one example, usually a public devotion in churches on Good Friday).