Butterfly Sriver FX vs Donic Bluestorm Pro AM: Which Should You Buy?

UltraSpin comparison · 2026-06-12 · rubber

Butterfly Sriver FXDonic Bluestorm Pro AM
Our rating7.8/108.4/10
best_sidebothbackhand / all-round forehand
controlhigh9.2
speedmedium9.1
spinmedium-high9.4
sponge_hardnesssoft47.5 degrees
typehigh-tension inverted (soft)inverted
weight_uncut_g6250

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Technological divide. Sriver FX (7.8 rating) is the softest available—excellent control and consistency but lacks catapult, speed, and high throw. Modern tensor Bluestorm Pro AM (8.4 rating) is the evolution: 47.5-degree sponge offering excellent balance of speed, spin, and control that scales with player technique. Its lighter weight (50g vs. 62g) and superior performance across shots give it the clear edge.

Sriver FX is retro comfort. Bluestorm Pro AM is the practical upgrade for any serious player.

FAQ

Why does Sriver FX perform better with glue?

Speed glue adds catapult and throw, compensating for its inherently soft, unglued limitations.

Is Bluestorm Pro AM too hard?

No. At 47.5 degrees with a slightly tacky topsheet, it’s forgiving for intermediate players yet serious for advanced.

Can Sriver FX match Bluestorm Pro AM spin?

No. Bluestorm Pro AM’s tensor sponge far outspins the classic high-tension design.

Which is better value?

Sriver FX costs less but offers less. Bluestorm Pro AM costs more and justifies it through performance scaling.

Best for short game?

Sriver FX’s softness and tacky feel. Bluestorm Pro AM is excellent but more demanding.