The numbers from the article are:

* $300 million for equivalent solar

* $200-400 million for equivalent onshore wind (they don't mention offshore wind which is more cost effective over it's lifetime)

* $1.5 billion for the SMR

Assuming solar and wind stay the same price for the next decade (which they definitely won't) that's a 4-5x construction price difference. The article didn't mention lifetime, decommissioning or running costs, which is likely a significant difference too.