Kopioitu suoraan dcrainmakerin buyers guidesta missä selitetty eri mittarityyppien erot:

Estimated Left/Right Power: This became all the rage just prior to true left/right units coming out, starting with the SRAM/Quarq RED unit offering left/right power. That platform works by essentially splitting your crank in half and assuming that any power recorded while pulling up is actually coming from the left side, whereas pushing down is from the right side. Thus, an estimation. It’s good, but not perfect.

Eli spider-pohjaiset ovat suuntaa antavia, mutta eivät täydellisiä tuloksia.
https://www.dcrainmaker.com/2016/09/...6-edition.html