@s710 You can compare with Geekbench 5 scores if you keep in mind that all Vollaphones are variants of Gigaset phones. (Yes, Geekbench is Android based, but it should be a good indication for Linux, too.)
The first Vollaphone corresponds to the Gigaset GS290; I see a single-core score of 150 and a multi-core score of 902. The FP4 is much faster: 642 and 1878.
BTW: The Vollaphone 22 corresponds to the Gigaset GS5 and is somewhere in the middle, with scores 352 and 1296.