I’m wondering besides the hiss and wow/flutter, what is the frequency range of cassette tape? Is there an “eq” to tape where certain frequencies are rendered more strongly than others? And how does it compare with records?

Back in the day, the plastic that wrapped blank tapes was printed with details about the tape inside, including a frequency response chart.

Of course it differed by brand.

It's also worth considering that a lot of tapes were recorded with Dolby B noise reduction, which boosted high frequencies on the recorded tape, to increase the signal to noise ratio. (You had to use Dolby B at the playback end, too, or it would sound too bright.)

Looking at the first example [1] looks like there is high pass, low pass, and two more “cuts”

[1] https://github.com/AARomanov1985/Audio-Cassette-Simulation/b...

I’m not sure of the correctness, but I see the author adjusting eq in the source, this is from the “BASF LH Extra C90” preset:

> highpass=f=50,lowpass=f=13000

> equalizer=f=500:width_type=q:width=0.8:g=-1.2,equalizer=f=6000:width_type=q:width=0.7:g=-4