It's not relevant. They are completely different and cannot be compared.
A slightly more reasonable comparison might be with the Yazidi girls who were forcibly kidnapped by ISIS and then beaten, burned with cigarettes, raped daily and in some cases sold on the dark web. Brave young women like Nadia Murad.
These Yazidi women were often kept captive and prepared and ceremonialy washed for their daily rape by voluntary ISIS brides like Begum. Several witnesses have given evidence of Begum's enthusiasm and brutality in enforcing subjection on these genuinely trafficked girls. This was part of the evidence considered by the home secretary in coming to his initial decision.
Let's not forget that even after she had left ISIS and was trying to get back to the UK, Begum is on record as saying that the bombing of the Ariana Grande concert in Manchester was justified.
The comparison of Begum the ISIS enforcer with the Rotherham girls or the Yazidi girls is simply not a sound comparison to make.
There are some individuals, and always have been, throughout history, who simply go beyond the pale of what it means to be humane and thus forfeit their right to live in a civilised society. Begum is one of those people. Let her go.