The offenders were convicted of robbery and unlawful confinement following a home invasion where imitation firearms were used and young children were present.
The Crown sought sentences of 6 years for Brown and 8 years for Hersi.
The court considered the principles of denunciation and deterrence, but also weighed the offenders' youth and prospects for rehabilitation.
Brown, a first-time offender who constructively pleaded guilty, was sentenced to 2.5 years minus pre-sentence credit.
Hersi, who played a more significant role, had a prior record, and was convicted of uttering threats, was sentenced to a total of 4.5 years minus pre-sentence credit.