Something to notice, this month is preparing as much as possible for the Ramadan which is the month of obligatory fasting.
While Munajat Shabaniya orients our attention to God and want to be in his sacred realm of closeness and glory and beauty, the Salawat Shabaniya makes us aware of the means to (Mohammad and his family) that and the means that God emanates his light and glory, and the highest signs.