What are the differences between each 4-channel analog unit?

What are the differences between each 4-channel analog unit?

Question

I’m considering buying a new memory high coder. What are the differences between each 4-channel analog unit?

Answer

This is a comparison table against the discontinued 8946 4-channel analog unit. Please refer to this table when you consider replacement. (Feb. 2021)
*The 8946 cannot be used with current Memory HiCoders (MR6000 series, MR8847A series, MR8827, MR8740/41, and MR8740T).

[Related products] New and old Memory HiCoders series, including MR6000, MR8847-51, 8860, 8861, 8841, and 8835-01.