If battery life is what you care about most, the HARPOON v2 WIRELESS comes out ahead. Corsair rates it for up to 140 hours over 2.4GHz with RGB off, while the SABRE v2 PRO MG is rated for up to 120 hours at 1kHz polling. The SABRE v2 PRO MG takes everything else on the sheet: 8,000Hz polling against 1,000Hz, 33,000 DPI against 26,000, and 56g against 80g.
Condition:
  • HARPOON v2 WIRELESS: the 140-hour battery figure is over 2.4GHz wireless with RGB off.
  • HARPOON v2 WIRELESS: over Bluetooth with RGB off, the rating rises to 210 hours.
  • SABRE v2 PRO MG: the 120-hour battery figure is over 2.4 GHz with a 1kHz polling rate.
  • HARPOON v2 WIRELESS: the 1,000Hz polling rate applies in both wired and wireless modes.
  • HARPOON v2 WIRELESS: 80g is listed with a tolerance of ±1g.

HARPOON v2 WIRELESS vs SABRE v2 PRO MG: the spec sheet numbers

HARPOON v2 WIRELESS vs SABRE v2 PRO MG: the spec sheet numbers
SpecHARPOON v2 WIRELESSSABRE v2 PRO MG
Battery life (up to) 140 h Better120 h
Max DPI 26000 DPI 33000 DPI Better
Max polling rate 1000 Hz 8000 Hz Better
Weight 80 g 56 g Better

What each number means

Battery life (up to)

Each figure is measured under a specific setup, and the setups differ. The HARPOON v2 WIRELESS number assumes RGB off. The SABRE v2 PRO MG number assumes 1kHz polling, not its top rate.

Max DPI

Both are sensor ceilings, the top of the adjustable range. You don't have to run either mouse anywhere near them.

Max polling rate

8,000Hz is the SABRE v2 PRO MG's maximum. Corsair's battery rating for it was measured at 1kHz, the same polling rate as the HARPOON v2 WIRELESS's maximum.

Weight

The SABRE v2 PRO MG gets to 56g with a magnesium alloy shell, and Corsair pitches it at FPS play. The HARPOON v2 WIRELESS is listed at 80g.

The trade-off

The HARPOON v2 WIRELESS has the longer battery rating, 140 hours against 120, but the SABRE v2 PRO MG polls up to 8,000Hz against 1,000Hz. Corsair's 120-hour figure for the SABRE v2 PRO MG was measured at 1kHz polling, not at that 8,000Hz top rate.

Exact source claims

  • Up to 140 hours over 2.4GHz with RGB off, and up to 210 hours over Bluetooth with RGB off
    Original quote
    The HARPOON v2 WIRELESS delivers up to 140 hours of battery life via 2.4GHz wireless with RGB off, and up to 210 hours via Bluetooth with RGB off
  • MARKSMAN 26K sensor, 26,000 DPI max, 650 IPS, 50G acceleration
    Original quote
    The CORSAIR MARKSMAN 26K sensor supports a maximum DPI of 26,000, with up to 650 IPS tracking speed and 50G acceleration
  • Up to 1,000Hz polling, wired or wireless
    Original quote
    The HARPOON v2 WIRELESS supports a polling rate of up to 1,000Hz in both wired and wireless modes
  • 80g (±1g)
    Original quote
    The HARPOON v2 WIRELESS weighs 80g (±1g) and measures 115.5±0.5 mm (L) × 68.3±0.5 mm (W) × 40.4±0.5 mm (H
  • Up to 120 hours over 2.4 GHz at 1kHz polling
    Original quote
    Up to 120 hours of battery life using 2.4 GHz with 1kHz polling rate
  • MARKSMAN S sensor, 33,000 DPI, 750 IPS, 50G acceleration
    Original quote
    Equipped with CORSAIR’s MARKSMAN S sensor for true 33,000 DPI tracking, 750 IPS speed, and 50G acceleration
  • Up to 8,000Hz polling
    Original quote
    8,000Hz hyper-polling for ultra-responsive input
  • 56g magnesium alloy shell
    Original quote
    Durable magnesium alloy shell at 56g for pro-level FPS play

Official sources