Mixing Ram Brands

I have a 27" iMac that I purchased in 2020. When I bought it I bought 64GB of Memory separately. More specifically I bought 2 Samsung 32GB DDR4 2666MHz RAM Memory Modules from Amazon. Since then it's been running good.

Recently I've been wanting to upgrade the Memory in my system from 64GB to 128 GB. I want to make my adobe Editing Software work smoother and to accomplish this I need to give it some more Memory space. Keep in mind I know Making Software run smoother also relies on Storage and other tech specs. I just want to work on what I can upgrade for now.

ANYWAY. I've been wanting to upgrade my Desktop iMac with more memory. Unfortunately, The Same pre mentioned RAM Card has one left for purchase and I prefer getting my RAM cards in Pairs. I can find other 32GB's of RAM on Amazon that are Mac Compatible however they are different brands.

Thus I was curious if It's ok to mix the brands of RAM Cards for my iMac?

I know it's more efficient to get them in pairs or just get all 4 but I'm a bit low on Money right now. I know what order to put them in and that is relatively safe to mix capacity's (Correct if Wrong). Right now I'm running a test by adding the 8gb's of ram that Came with the iMac when I ordered it. They are 8GB and not the same brand as the one I added.

Let me know your thoughts and Solutions. Thank you.