For me it would be what color do I want or need in my tank. Do I have too much green already? Then dragon soul due to the gold and purple. Or do I have some drab colors and really need a nice pop, then I’d do cotton candy. However, I’m also assuming price doesn’t matter.
If you are a first time torch owner, I’d definitely do cotton candy as they can not only be finicky but randomly finicky. I had a flashlight torch (one of the cheapest types on the market) for months and it just got BJD a couple weeks ago. Soo yea. Not sure if my rambling helped any