What setting casue the different results in HFSS?

Hi, Gurus,
There is an antenna design, Mr. Dr simulated and got the result as: DrXu_78G_20221011163612.jpg.
I silumlated and got the result as: My_78G_20221011163713.
The two results are so different.
I wonder what setting in HFSS can cause so difference in result.
I don't know Mr. Dr's setting, but my setting in HFSS as following:
Max Number of Passes: 20
Max Delta : 0.02
Do lamda refinement
First Order
Direct Solver
Max Delta Zo: 2%
Use Radiation Bounkdary on Ports
IE Solver options: Auto
Banlance speed and accuracy
Mesh size=5
Mesh method=auto
model resolution=auto
waveport: width=3mm(z50=0.29mm), height=1.3mm(RF board 5mil height)
Solution type=modal
driven option=network analysis

I really don't know what setting cause so big difference.

Best,
Tony Liu