The diameter is probably the most important factor when choosing braid for casting small spoons as the thickness and smoothness of the braid and your own ability will give you the desired distance when casting.
What brand of braid on the local market which will give you durability and strength, combined with the right diameter to cover the species you are trying to catch, is the big question?
Yellowtail is a dirty fighter and will head straight for structure and tie you up, so your pound to diameter ratio needs to be correct with a tighter drag. Garrick fight on the surface so you can go down in the thickness and play the fish at your own leisure. Never caught Kingfish, so cannot comment.
Braids I have used are Suffix 832, Jerry Brown, Power Pro (Original), Gator Braid (Triple Fish) and JDB.
*Suffix 832 - Strong, reliable, a bit thick which will restrict your distance. For trolling or backing no problem.
*Jerry Brown - Used some hollow core 40lb once, very strong but held a lot of water which restricted casting distance.
*Power Pro (Original) - Used the 30lb for a couple of years on Yellowtail, found it very strong, reliable and hard wearing, the roughness can restrict your casting distance. There is a slick version, not tried it so cannot comment.
*Gator Braid (Triple Fish) - Used the 48lb 0.21 thickness 8 strand and still have some on a spool. Casts a mile. You could use the 33lb variant or thinner too. Remember only ever buy the 8 strand in this braid, the 4 strand I had once failed miserably. I did notice with the Gator due to its thin diameter that the slightest wear will result in failure and you will have to re-spool new line when this happens. So great while it lasts but inspect regularly.
*JDB - Using some currently in 50lb which is 0.27mm thick, not bad, casts OK but the 40 or 30lb will do much better I think. Only being using it for a short while, seems good, so far happy with it. The diameter to lb ratio and slickness of this braid is very good. Once again only buy the 8 strand for casting.
I think all of the above braids are fine. Hope this helps.