fuji superia 200 and 400 are still fairly easy to acquire, with most drug store branded film being almost certainly the same stuff.
There actually are (were) a few different flavours of Superia 400.
Currently, there's Superia 400 X-TRA (as its branded in Japan) which is the cheap version and almost certainly the version used for drug store brands, and there's also Superia 400 Premium (available only in Japan?) which if I recall correctly has a better colour palette for Asian skins. Its considerably more expensive than Superia 400 X-TRA so there better be something different about it!
There was also Superia 400 Venus (possibly only available in Japan, now discontinued) which had four colour layers as apposed to three as used in the current Superia 400 X-TRA. This was my favourite C41 film of all time, but unfortunately it was discontinued a few years ago and replaced with Superia 400 X-TRA. Venus and X-TRA have a similar colour palette, but Venus was much less grainy (more like an ISO100 film).
These days I use Fuji C200 (cheap and cheerful!) and Fuji Superia 400 X-TRA a lot and IMO they're both very decent films for the price. I rarely use flash so don't have any flash shots but here's a few non-flash shots.
Fuji Superia 400 Venus (that's the Nikon 101 Building in the background where all flagship Nikon cameras up to the F3 were made)

Fuji Superia 400 X-TRA

Fuji Superia 400 Premium

Fuji C200
