At annualized rates, their advance estimate is -7% for real private purchases and -5% for aggregate real purchases (real GDP)
My estimate is -8% for real purchases, both public and private.
BEA and I disagree significantly on government purchases (we agree on government transfers, which are the vast majority of the Federal relief efforts and are not part of GDP).
Because the "shutdown" occurred near the end of the quarter, my Q1 estimate (and BEA's) is particularly sensitive to the allocation of costs across days.