Modern laptop batteries are made up of multiple cells of Lithium Ion batteries.

According to batteryuniversity.com

The nominal voltage of lithium-ion is 3.60V/cell. Some cell manufacturers mark their Li-ion as 3.70V/cell or higher. This offers a marketing advantage because the higher voltage boosts the watt-hours on paper (voltage multiplied by current equals watts). The 3.70V/cell rating also creates unfamiliar references of 11.1V and 14.8V when connecting three and four cells in series rather than the more familiar 10.80V and 14.40V respectively. Equipment manufacturers adhere to the nominal cell voltage of 3.60V for most Li-ion systems as a power source.

All lithium ion batteries have the same nominal voltage. Any differences are labeling errors or deliberate manipulation.

Modern laptop batteries are made up of multiple cells of Lithium Ion batteries.

According to batteryuniversity.com

The nominal voltage of lithium-ion is 3.60V/cell. Some cell manufacturers mark their Li-ion as 3.70V/cell or higher. This offers a marketing advantage because the higher voltage boosts the watt-hours on paper (voltage multiplied by current equals watts). The 3.70V/cell rating also creates unfamiliar references of 11.1V and 14.8V when connecting three and four cells in series rather than the more familiar 10.80V and 14.40V respectively. Equipment manufacturers adhere to the nominal cell voltage of 3.60V for most Li-ion systems as a power source.

All lithium ion batteries have the same nominal voltage. Any differences are labeling errors or deliberate manipulation. Certain modifications to the lithium ion chemistry can change the nominal voltage, but doing so would make the battery incompatible with the equipment it was designed to operate with. The difference in labeling you see is insignificant.