Performance per £ Value
Performance per pound results from the Ryzen 3000XT processors in Cinebench R20 are not particularly strong. Both the 3800XT and 3900XT are undeniably better value than their Intel competitors in this workload. However, the significantly cheaper comparable Ryzen 3000X chips are far better value based on current retail pricing.
Of course, if you are happy to pay up for higher operating frequencies of the XT parts and the superior performance it brings, then value on a cost basis may be of less importance to you.