why s8 is running on one ui version 1.0

[ChandraShekharSagar]

Why galaxy s8 is running on one ui 1.0 with android pie while some smartphones running on one ui 1.1 with Android pie like s9 or a series phones

[Kartik271994]

s9 has already got one ui 2.0 beta version i.e android 10😌

[Anonymous]

and s9 running on pie 1.0 only not 1.1...now it's running on beta 2.0