Although the two share some common ground, I believe they emphasize different points. In “namarupa paccaya salayatana,” the emphasis is on the contamination of the mind. This leads to samphassa, samphassa ja vedana, tanha, and upadana. On the other hand, “bhava paccaya jati” emphasizes the consequences that follow bhava. This leads to jati paccaya jara maranam soka parideva dukkha domanassam upayasa.
For example, in the case of theft, the former describes the process by which the mind is contaminated through theft, while the latter describes the suffering that theft leads to.
Therefore, I think these two discuss the same thing in different ways.