Magene P715 vs Favero Assioma

This is one of the most searched power meter comparisons right now for a simple reason: the P715 claims the same headline accuracy as an Assioma, for noticeably less money, in both cleat systems. If the claim held in every respect, Favero would have a problem. It mostly holds — and the places where it does not are specific, checkable, and worth ten minutes before you spend the money.

What both companies publish

Both claim ±1% dual-sided. Favero attributes its figure to the IAV Power System, which measures the actual angular velocity through the pedal stroke rather than assuming a constant one. Magene states ±1% without an equivalent named mechanism. Neither claim is testable at home, which is exactly why the independent record matters.

On hardware, the Pro RS-2 is the best sheet in the room: 124.8 g per pedal, a 10.5 mm stack, 0 to 3,000 W, 10 to 250 rpm and up to 160 hours. The P715 answers with 157 to 159 g per pedal, an 11 to 13 mm stack depending on version, 120 hours and IPX7. The Assioma Duo is the oldest platform of the three and has the shortest claimed runtime, which is part of why it is the cheapest.

The connectivity difference is the real one

Magene's own specification for the P715 lists one Bluetooth connection alongside unlimited ANT+. For a rider on Windows or macOS with an ANT+ adapter, that is a non-event: ANT+ is the better protocol for a pain cave anyway and there is no practical limit. For a rider on an Apple TV, it is the single most consequential line on this page. Zwift Insider documents a two-Bluetooth-connection ceiling inside the game on Apple TV, with the remote claiming one of them, and Zwift Companion can bridge Bluetooth but not ANT+.

So the honest version of this comparison is platform-dependent. ANT+ vs Bluetooth for Zwift explains the protocol difference, and best power meters for Zwift ranks the whole category on exactly this axis.

What reviewers have actually measured

On the Favero side the record is long and broadly consistent. For the Pro RS, DC Rainmaker found it within a few watts of an Elite Justo 2, around 2 W from a Muov and half a watt apart on a roughly 700 W sprint. road.cc was more critical, recording it about 5.5% under a SRAM Rival meter overall with steady-state agreement nearer 1.5%. Both are real findings and both belong in the same paragraph.

On the Magene side the record is shorter and does not converge. GPLama reported the pedals inside their claimed specification. Cyclists Hub measured averages roughly 2.1 to 2.8% under a Kickr v5, with maxima 4.8 to 6.2% apart. the5krunner saw differences of about 5% against a 4iiii and about 4% against a Magene P505. Three competent reviewers, three different pictures. That is not a verdict against the product; it is the reason we rank Favero first on measurement record and Magene first on value.

If that spread bothers you more than the price gap, read how accurate are power meters before deciding. The honest conclusion there applies here too: consistency matters more than absolute truth, because every number you train to is a measure of change.

So which one?

Your cleat picks the pair. SPD-SL shoes put the Pro RS-2 against the P715 S. Look Keo shoes put the Assioma Duo against the P715 K. Cross-cleat comparisons are mostly academic unless you are buying shoes at the same time.

Your platform picks the brand. Apple TV or a tablet, with other Bluetooth sensors in the mix: Favero. PC or Mac with an ANT+ stick: either, and then price decides.

Your tolerance for uncertainty breaks the tie. Favero costs more and comes with a thicker file of independent testing. Magene costs less and comes with three reviewers who do not quite agree. Both are legitimate purchases; they are not the same purchase.