You need something like the PPK to see the differences in power consumption.
PPK2
Power Profiler Kit II - nordicsemi.com 1
The Power Profiler Kit II (PPK2) is a standalone unit, which can measure and optionally supply currents all the way from sub-uA and as high as 1A on all Nordic DKs, in addition to external hardware.
The PPK2 is powered via a standard 5V USB cable, which can supply up to 500mA of current. In order to supply up to 1A of current, two USB cables are required.
An ampere meter only mode, as well as a source mode (shown as AMP and source measure unit (SMU) respectively on the PCB) are supported. For the ampere meter mode, an external power supply must source VCC levels between 0.8 and 5V to the device under test (DUT). For the source mode, the PPK2 supplies VCC levels between 0.8 and 5V and the on-board regulator supplies up to 1A of current to external applications. It is possible to measure low sleep currents, the higher active currents, as well as short current peaks on all Nordic DKs, in addition to external hardware.
Andreas Spiess video about that device. 1