There are warm-up times that marketing and influencers and retailers use; there are times that people who have never measured actual temperature use, and there are times that people who actually measure brew temperatures of multiple shots.

The Silvia Pro has no thermosyphon nor does it use the steam boiler to help heat the brew boiler. It is not a saturated group, despite claims from vendors who should know better. The group is heated by conduction from the brew boiler, which is going to be slower than a thermosyphon, albeit with less mass than an E-61 (still lots of brass, though). Also keep in mind that 220v/230v reviews that you may have read are not constrained like 120v machines, which can't heat both boilers at full power simultaneously. A trusted vendor, 1st-line, says "although the Silvia Pro can warm up from 20-30 minutes, the best warm-up period is from 45-60 minutes because there is a lot of mass and metal to warm up." This is inline with a PID Silvia, which is typically 35 minutes (uninsulated), with another 20 or so minutes needed for repeatability.

Note that's about what a Mara X warm-up is - warm-up in 25 minutes, with another 30 minutes for repeatability - according to the Mara X thread.

There are many factors that affect actual warm-up times, but a Silvia Pro cannot have half the warm-up time of a Mara X, given that both are in a comfortable draft-free household environment.