What are the differences in memory and storage capabilities between the MacBook Pro M4 and the 16-inch MacBook Pro with Intel Core i9

MacBook Pro M4

- Memory: The MacBook Pro with the M4 chip starts with 16GB of unified memory, which can be configured up to 32GB for the standard M4 model[1][9]. For the M4 Pro and M4 Max configurations, especially in the 16-inch model, it can support up to 48GB or even 64GB of unified memory, depending on the specific chip configuration[8][11].

- Storage: Storage options for the M4 MacBook Pro include a 512GB SSD, with configurations available up to 2TB[9].

16-inch MacBook Pro with Intel Core i9 (2019)

- Memory: This model comes with 16GB of DDR4 RAM by default but can be upgraded to 32GB or 64GB at the time of purchase[2][10]. The RAM type is DDR4, which operates at 2400MHz for the 32GB model[10] and 2666MHz for other configurations[12].

- Storage: The storage options for this model include a default 512GB SSD, with configurations available up to 8TB[12].

In summary, the M4 MacBook Pro offers unified memory with faster bandwidth, while the Intel Core i9 model uses traditional DDR4 RAM with more upgrade options. The M4 models have more limited storage configurations compared to the Intel-based models, which can support up to 8TB of storage.