Types of sdk in .net 6 and their difference

Hi
Can we know the difference between these 3 sdk versions in .net 6.0.5

1) SDK 6.0.300
2) SDK 6.0.203
3) SDK 6.0.105

Also if we install SDK 6.0.300 over SDK 6.0.101 ,we will be able to see two versions in control panel . So can you please let us know the difference between these 3 version (SDK 6.0.300,SDK 6.0.203,SDK 6.0.105) of SDK