Hi there, honestly we can’t think of any film that can match Portra be it 160 or 400. But if you’re looking for cheaper alternative, Fuji Superia Xtra 400 is a staple and we find that it shoots really, really well in dim lighting.
We love Kodak Gold 200 & even Ferrania 100ISO color negative but unfortunately the latter is no longer in production unless the rebooted (aka Kickstarter funded) Film Ferrania finally gets their R&D sorted out, we are stuck with whatever Fuji & Kodak has to offer.
Here’s to hoping that Kodak manages to keep themselves afloat (https://www.thephoblographer.com/2019/02/02/reports-state-that-kodak-alaris-is-looking-to-sell-assets/) and Fujifilm soldiers on with their current film line up.