What do you meso vs microneedle?

I'm excited to shop the Meamo sale but am overwhelmed. There are so many products discussed in this sub, and I'm curious which ones you meso vs microneedle and why.

For example, I have Curenex and Velatox and have only mn Curenex so far. But I'm ready to meso and have my eyes on Selatox, Miracle H, Miracle Touch Br, Rejuran HB, and Selastin Exo. I have a feeling most of you meso these but what about mn?

And how do I know which needle gauge I should use?