Hilti Profis vs Simpson Anchor Design Program

I am a structural engineer and was designing an adhesive anchor for a project and wanted to compare Simpsons products and Hilti products to give our clients some options. When I was comparing the two, I found that between the Simpson anchor design program and Hilti Profis, Hilti Profis had a 23% reduction in steel capacity when looking at a rebar anchor. I took a deeper look into the two and even looked at the ESR reports (ESR-4057 and ESR-3814) and found these following differences: Simpson uses an ultimate tensile strength of 90ksi whereas Hilti uses 80ksi. Secondly Simpson uses a phi factor of .75 for tensile strength whereas Hilti uses a phi factor of .65. Could you provide some information on what Hilti considers ductile steel vs brittle steel according to ACI 318-19 17.5.3(a) and why a phi factor of .65 is used? Is there a reason why Simpson would use 90ksi vs 80ksi ultimate tensile strength? I am just trying to figure out why there is a big reduction in tensile strength between Simpson and Hilti. Any information would be helpful.