ASICS Sonicblast 2 vs Saucony Endorphin Speed 6

ASICS Sonicblast 2

+ Praised

The redesigned shoe is more fluid and lively at marathon and tempo efforts, though its stiff midfoot and less energetic heel can feel awkward at easy paces.

Saucony Endorphin Speed 6

± Divisive

The new PWRRUN PBX foam and stiffer nylon plate make the Speed 6 firmer and snappier than its predecessor, which most testers love for tempo and threshold work but a few find harsh and uninvolving at easy paces.

ASICS Sonicblast 2

± Divisive

The high stack protects well on long runs, but its firmer feel is not to every runner’s taste and the forefoot bounce is more noticeable than the heel.

Saucony Endorphin Speed 6

+ Praised

A taller stack of lighter, bouncier foam takes the edge off long efforts and keeps the shoe comfortable at marathon pace, though the firm, plated ride still feels best at speed rather than during recovery miles.

ASICS Sonicblast 2

+ Praised

The lighter mesh is breathable and generally secure with useful toe volume, though some find the racer-focused upper less plush and the toe shape tapered.

Saucony Endorphin Speed 6

± Divisive

A light, breathable mesh with a gusseted tongue locks the foot down securely, but the tapered toe box, low ceiling and scratchy material cause pressure and hot spots for several testers.

ASICS Sonicblast 2

+ Praised

Early reports and lab testing suggest the outsole holds up well, while the thin toe mesh is a possible weak point.

Saucony Endorphin Speed 6

± Divisive

The rubber outsole is sparse at the heel and some testers worry it will wear through quickly, while others see only minor wear and expect the foam to hold its bounce.

ASICS Sonicblast 2

+ Praised

Lab results are excellent and runners report dependable road traction, with no major grip concerns in early use.

Saucony Endorphin Speed 6

± Divisive

Traction is dependable on dry roads and moderate gravel, though the exposed foam becomes slippery once the thin heel rubber wears away.

ASICS Sonicblast 2

± Divisive

Several reviewers find the broad geometry and firmer foam unusually composed for a tall trainer, while others caution it is still a neutral shoe and not the most stable option.

Saucony Endorphin Speed 6

+ Praised

The wide forefoot, nylon plate and SpeedRoll geometry make it stable for a plated trainer, but the narrow arch leaves it less planted for runners who need support late in a race.

ASICS Sonicblast 2

± Divisive

Some consider the price reasonable for a versatile plated trainer, while others question the premium given the ride and alternatives in the range.

Saucony Endorphin Speed 6

+ Praised

At $175 it undercuts carbon racers and handles both workouts and race day, though some testers think the formula is ageing and prefer the cheaper, more versatile Endorphin Azura.