Special blend rival is no turn and reliable fade out of the box and they hold that flight for quite a while, i will say that my special blend (before i lost it at Ledgestone Open) broken in was my favorite hyzer flip fairway driver BY FAR. Hyzer flip to flat and hold straight forever with a forward fade toward the end, i have a stack of backups for the SB rival
silver legend generally has a little more stability to them than icon or pinnacle and like to fade a little earlier but i have always gotten my icon or pinnacle rivals farther so i didn't bag any of my silver legend rivals.
I feel like everyone likes the SB rival because it flies exactly the way a rival is supposed to and they break in AMAZINGLY for some reason.. they get that super straight flight over time and then they start to get a slow turn that holds with a little anny on the release and makes them extremely versatile.
in my opinion the rival in any plastic is a good choice, i have noticed certain pinnacles start out with just a touch of turn, and pinnacles that are exactly like SB rivals, and a blue pinnacle that has a touch more fade. i have rivals in every plastic that fly the same.
Pinnacle: in general i have found some pinnacles that start with a touch of turn.
Icon: these fly the farthest for me and are in the middle as far as stability.
Legend: most legends are a little more overstable, or maybe its just that they have a touch less glide.
Special Blend: super straight with a reliable fade, exactly how a rival is supposed to fly.
I bag a SB, 2 Icon and pinnacle.