The heat up time was the main reason I got the Lelit. You go from switch on to brew temp in 3 minutes, including heating the group head and portafilter.
Then its also got a PID, and its an absolute game changer. No temperature surfing needed, and you can play around with lighter roast beans.
The pressure guage also allows you to do a brute force pre infusion.
The only downside compared to the Rancilio is that its 57mm and the Silvia has a bigger steam boiler. That said, I managed to find all the accessories for the Lelit, and you can get cafe quality steam milked with some adjustment on the PID.