I think it may help to read the sentencing guidelines on some of the crimes that are being discussed here and also to realise that there are both mitigating factors and aggravating.
So each crime type has a guideline sentence (so say 4-20 years) and it will depend on remorse, if they plead guilty or not guilty, other offences committed if they have offended before etc etc etc as to which end of the scale they get sentenced at....
So it is entirely possible a someone being convinced of rape, on a first offence who pleads guilty and who has never previously offended can receive a lower sentence than someone convicted of multiple counts of fraud, deception, theft, with many previous convictions....
It doesn't reflect on any single victim. The victim of the rapist will be more harmed but the victim(s) of the fraudster will be far far more numerous. Gutter rags like the Metro look for the extremes of sentancing as they are always unusual cases.
https://www.sentencingcouncil.org.uk/crown-court/