The Kingston drive is NVMe, the SiliconPower drive is SATA3.
If the motherboard you're looking at supports NVMe/PCIe M.2 drives, then yes, the 10EUR investment probably makes sense.
Is it "worth it" though? Really depends on your use-case. For an average user, the improved boot/load/save times are not going to be overly noticeable (might save a second or two here or there)....... Outside of benchmarks, they'll "feel" pretty much the same.