Difference between Planning Strategy 40 & 70

Hello Team,

I am investigating the difference between the below planning strategies

40 - Planning with final assembly ( Falls into MTS category)

70  - Planning at assembly level (Falls into MTO category)

In the both the above strategies, the final FERT material is planned only after the receipt of the sale order. And till the components of the final FERT is planned without receipt of FERT sale order. And in both planning strategies (40 & 70), the incoming sale orders consume the PIRs / forecast.

How these two strategies (40 & 70) differ?

Thanks