They don’t sound super Stratty. There is a little of that but they’re darker. This is typical of shorter-scale guitars — Les Paul being the extreme example. Of course I lean into that by putting humbuckers in them, so I’m not even trying to get something Strat-like.
I’d also point out that there is significant guitar-to-guitar variation which I can’t really explain, since they’re all just basically planks of wood bolted together. I know the whole “tonewood” thing is controversial, but whatever is contributing to the difference in sound, it’s cleary there, even when strumming acoustically.
As an example, here’s the Musicmaster. This is a before and after with the stock vintage '60s single coils and the humbuckers. You’ll notice with the singles it’s not super thin or bright. I just mainly replaced them for the noise control:
Edit: I’m not sure why I wrote “1976 single coil” in the video. Maybe I did some research on that and found that they’re not stock. Either way they’re definitely old.
By comparison, here’s one of the Duo-Sonics with the stock single coils on clean tone. This is the brightest of the short-scale guitars that I own, and again, the difference is apparent even acoustically. I don’t know why that is. It has its charm if you want something really chimy but like the Musicmaster better:
https://www.instagram.com/p/CG3lwImH-nf/