Butterfly Glayzer vs Yasaka Rakza 7: Which Should You Buy?
| Butterfly Glayzer | Yasaka Rakza 7 | |
|---|---|---|
| Our rating | 8.2/10 | 8.6/10 |
| best_side | Forehand or Backhand (all-round offensive) | both |
| control | High | high |
| speed | 81 (manufacturer) | offensive |
| spin | 73 (manufacturer) | high |
| sponge_hardness | 38 degrees (JPN) | 45–47° |
| type | Inverted / High Tension (Spring Sponge X) | tensor inverted |
| weight_uncut_g | around 48g uncut | 70 |
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Two similarly-priced inverted rubbers, one real difference
Butterfly Glayzer (8.2 overall) and Yasaka Rakza 7 (8.4 overall) sit close enough on aggregate rating that the number alone will not tell you which to buy. The axis data is more useful, and it points to one gap that actually matters at the table and several you can safely ignore.
The gap that matters: throw angle
The biggest split in the axis data is throw, where Glayzer sits at 6.5 against Rakza 7’s 5.5 - a full 1.0-point delta in Glayzer’s favor. On a 0-10 scale, a full point on throw is the kind of gap you feel: it is the difference between a rubber that arcs higher off a slightly closed racket angle (Glayzer, built around a 38-degree Spring Sponge X sponge and a Dignics-05-derived topsheet, per its own source material) and one that plays flatter and lower to the net (Rakza 7, at 45-47 degrees sponge hardness). Players moving from a low-throw European tensor to Rakza 7 will not need to relearn much; players moving to Glayzer should expect a session or two of overshooting long balls before the arc calibrates.
Durability also splits meaningfully - Rakza 7 rates 8.0 against Glayzer’s 7.5, a half-point edge that Megaspin’s buyer reviews and RacketInsight’s coverage both treat as one of Rakza 7’s selling points at its roughly 48-50 dollar street price. It is not dramatic, but if you re-sponge every six to eight weeks, half a point of longevity compounds across a season.
The gaps you can ignore
Speed (8.6 vs 8.9, delta -0.3) and control (9.1 vs 8.9, delta +0.2) both sit in the range where blade choice, technique and even the ball you are using will move the needle more than the rubber itself. Neither rubber is meaningfully faster or more controllable in practice - do not let a spec sheet talk you into believing otherwise. Spin (8.8 vs 9.2, delta -0.4) leans toward Rakza 7, and that lines up with its own billing as delivering “exceptional loop and block ratings,” but it is not the kind of gap that will single-handedly fix a weak loop.
Should you switch?
If you already own a Glayzer and are wondering whether Rakza 7 is worth the swap: probably not, unless you specifically want the lower throw angle and slightly better durability, and you are willing to trade away the higher, more forgiving arc Glayzer is built around. Both rubbers are explicitly positioned for the same kind of player - Butterfly targets 1200-1800 USATT intermediate offensive players, and Yasaka frames Rakza 7 as a rubber for “building consistency and spin technique.” This is a lateral move between two rubbers aimed at the same level, not an upgrade path.
The one case where switching is clearly worth it: if Glayzer’s own listed weakness - “not optimally suited to backhand players who prefer a bouncier, linear feel” - describes your complaint exactly, Rakza 7’s flatter, more linear character is a legitimate fix, not a marginal one.
What each rubber is built for
Glayzer’s own pros list highlights “exceptional consistency and low error rate in blocking and short game” and a “wide gear range” that covers both gentle touch play and full-swing loops - a genuinely all-round rubber for both wings. Rakza 7’s pros lean toward “linear, predictable performance ideal for skill development” and ITTF approval for competition play, with a caveat in its own cons that it is “not optimal for pure defensive choppers.” Neither rubber is a specialist tool; both are built as dependable, forgiving options for developing offensive players.
Bottom line
Neither rubber dominates the other. Glayzer wins on throw angle and blocking or short-game consistency, per its own listed pros; Rakza 7 wins on spin, durability, and price, per Megaspin’s and RacketInsight’s coverage. If you are deciding fresh rather than switching from one to the other, pick based on throw-angle preference and budget - that is the one axis pairing here backed by a full point of separation. Everything else in this comparison is close enough to be a coin flip dressed up as a decision, and treating it otherwise will not improve your game.
Frequently asked questions
Is Butterfly Glayzer or Yasaka Rakza 7 more spin-heavy?
Rakza 7 rates slightly higher on the spin axis, 9.2 versus Glayzer's 8.8, a 0.4-point gap. It is a real but modest difference - noticeable over time, not something that will single-handedly transform your loop.
Which rubber has a lower throw angle for flatter hitting?
Yasaka Rakza 7, at 5.5 versus Glayzer's 6.5 on the throw axis - a full 1.0-point gap, the largest difference in this comparison. Rakza 7 plays flatter and lower to the net; Glayzer arcs higher and needs a slightly more closed racket angle.
Is Yasaka Rakza 7 more durable than Butterfly Glayzer?
Yes, by a modest margin - 8.0 versus 7.5 on the durability axis, a 0.5-point edge that Megaspin's buyer reviews cite as one of Rakza 7's practical advantages at its price point.
Should a backhand player pick Glayzer or Rakza 7?
Glayzer's own cons list flags that it is not optimally suited to backhand players who prefer a bouncier, linear feel - if that describes you, Rakza 7's flatter, more linear character is the better fit.