What is the difference between a single memory module (RAM) and a kit?

Question

Iron

Hello again!
I wanted to increase the memory on the recently purchased Mac Mini (I stopped at 8GB), and when I started looking for what to buy, I found that the strips are sold individually, and in sets (In my case, consisting of two pieces).
I could not find an answer, what is the fundamental difference between them, Wikipedia says this:

Dual channel mode can be obtained by using an even number of DIMMs.
To enable dual-channel mode, the following conditions must be met:

• same DIMM configuration per channel;
  
• the same capacity (128 MB, 256 MB, 512 MB, etc.);
  
• memory channels A and B must be identical;
  
• on most motherboards (with rare exceptions) symmetrical memory slots (slot 0 or slot 1) must be populated

That is, in dual-channel mode, memory of the same frequency, of the same type will work. Memory of different sizes will work if all conditions are met.

Do I understand correctly that there will be no difference if I buy a set of two pieces or two identical planks ?
And yes, maybe it's easier to buy one bar for 8GB?
Thank you!

Answer 1

Buy two identical bars. It can even be different, but with the same frequency and timings.