The diffrence between the spice schematic and the mex schematic

Hi guys,

I'm using the BFU730F to design a LNA, i downloaded the design kit but i see there's two types of the transistor, a spice schematic and a mex one. i tried both on ADS but they give me different results.

I was wondering if anyone knows what's the difference between both models and why i dont get the same results?

Thank you in advance.

https://www.nxp.com/wcm_documents/mo...tion_504.7.pdf

Mextram models should provide better simulation models especially for vertical bipolar transistors.
Even they are more than 30 years younger than Spice Gummel–Poon models, I am still stuck using old Spice models.