Comparison

stSUI vs vSUI / haSUI / afSUI

Feature	stSUI	vSUI / haSUI / afSUI
Unstaking	Instant (1 tx)	Cooldown required
Depeg risk	Lower	Higher
Reward model	Exchange rate	Exchange rate
Multi-validator	Yes	Varies

The big difference is instant unstaking. With other LSTs, if the token drops below peg on a DEX, arbitrageurs can't redeem fast enough to close the gap. With stSUI, redemption is one transaction, so the peg holds tighter.

AlphaFi Staked SUI vs SpringSUI Ecosystem LSTs

AlphaFi Staked SUI is forked from SpringSUI. The differences:

Feature	AlphaFi Staked SUI	SpringSUI
Multi-validator optimization	Yes	Originally single-validator
Flash staking	Yes	Not in base framework
Redemption fee	Can be redistributed to stakers	Retained by operator

Same lineage, different focus. stSUI's additions are aimed at DeFi composability and aligning the operator with stakers.