この記事でもF-22 の方が小さい
http://natoassociation.ca/wp-content/uploads/2017/05/The-F-35-Fighter-A-Logical-CF-18-Replacement-Final.pdf

The F-22 Raptor has an RCS of about 0.0001 square meter and an F-35 has an
RCS of about 0.005 square meter.