Jim the building was not shoddy.It is likely the later addition of cladding was, but that has yet to be determined by the public enquiry.
Your original statement is factually incorrect. The WTC high rise buildings collapsed in a fire, Grenfell tower retained it's structural integrity. I do not believe it is abusive to point out your errors.Would you like me to refresh your memory where you recently asked me to?

https://www.quora.com/Why-is-the-Grenfell-Tower-still-standing-after-burning-for-almost-24-hours-while-the-WTC-Towers-collapsed-after-burning-for-just-a-few-hours