I did some geekbench tests.

4 GB, 3 CPU AMD [1]

8 GB, 4 CPU AMD [2]

8 GB, 2 CPU (dedicated) AMD [3]

So even though the dedicated CPU option has stable performance, the shared CPU is almost 4x as fast. Sure, the shared results would fluctuate but given they are similar priced. Or maybe I was just lucky and got on an empty node.

[1]: https://browser.geekbench.com/v6/cpu/2360706

[2]: https://browser.geekbench.com/v6/cpu/2360698

[3]: https://browser.geekbench.com/v6/cpu/2360730