Fujifilm 400 (made in the USA) vs. Kodak Ultramax 400 - The Same, or Different? - 35mmc

I can't help but arrive at these two film stocks appearing so close in results that I might as well think of them as interchangeable.

For science I pushed rolls of Fuji 400 to 800/1600 and here are the unedited results. : r/AnalogCommunity

Cheap 35mm Film Comparison - Kodak Ultramax 400 vs Fuji Superia 400

Kodak Ultramax 400 vs Fuji Superia Xtra 400 vs Lomo CN400

Cheap 35mm Film Comparison - Kodak Ultramax 400 vs Fuji Superia 400

Fujicolor C200 vs. Kodak Ultramax - The Battle of the Cheap Film Stocks — Danilo Allen

Film Comparison: Kodak UltraMax 400 vs Kodak Gold 200 Pushed One Stop » Shoot It With Film

Comparing Fuji 400 (Made in USA) to Kodak Ultramax: Are they really the same?, by Robin Férand

Comparing Fuji 400 (Made in USA) to Kodak Ultramax: Are they really the same?, by Robin Férand

Kodak Utramax 400 vs. FujiFilm Superia X-TRA 400 - Comparision - The Darkroom Photo Lab

Cheap 35mm Film Comparison - Kodak Ultramax 400 vs Fuji Superia 400

The Best Affordable 35mm Film

Fuji Superia X-TRA 400 vs Kodak Ultramax 400 Film Stock Comparison » Shoot It With Film

Cheap 35mm Film Comparison - Kodak Ultramax 400 vs Fuji Superia 400