Would OSHA consider a label that includes an OSHA signal word and hazard statement in addition to the CPSC label element to be in compliance?

No. The information in your example would cast doubt on the validity of OSHA's required information in violation of 1910.1200(f)(2) and Appendix C.3.1. Hazard Communication Standard (HCS) 2012 classifies a chemical as flammable based on its flash point, and in some situations, its initial boiling point. See chapter B.6.2 of Appendix B, Physical Hazard Criteria. The HCS 2012 requirements for Category 3 and Category 4 flammable liquids have different flashpoints than the Consumer Product Safety Commission’s (CPSC’s) flammable/combustible cut-off limits. Under HCS 2012, a Category 3 flammable liquid has a required signal word “Warning” and hazard statement “flammable liquid and vapor,” and a Category 4 flammable liquid has the required signal word of "Warning" and hazard statement of “combustible liquid.” Thus, the use of the CPSC “Warning: combustible liquid” casts doubt on the Category 3 flammable liquid classification and may cause an employer or employee to think that the chemical is less hazardous than it is.