I'm late to the thread, but if it were a base model M1 Pro versus a base model M2 Pro (as the poll suggests), then I'd select the base M2 Pro, even if the SSD is a bit slower (it's still fast as SSDs go).
However, if instead you get the fully upgraded M1 Pro (10-core CPU/16-core GPU), plus some extra RAM, plus maybe some extra SSD, for the same price as the base M2 Pro, then there's no contest that the loaded out M1 Pro would be a better deal.
However, if instead you get the fully upgraded M1 Pro (10-core CPU/16-core GPU), plus some extra RAM, plus maybe some extra SSD, for the same price as the base M2 Pro, then there's no contest that the loaded out M1 Pro would be a better deal.