You can't just dismiss the 8GB RAM and 256GB SSD in the lowest end Mini, especially when the RAM is now non-upgradeable and part and parcel of deciding which SoC you need. 512GB SSD is probably compulsory if you want to install bulky Pro software like Logic and have enough space for your work-in-progress video/audio projects on the fast drive. If you don't want that then the 8GB/256GB is probably fine.
So I don't think it's valid to dismiss the $1099 Mini config as an intermediate between the base Mini and the Studio.
Now, looking at MBP 14" prices, the difference between the M1 Max and the M1 Pro is $600 (the RAM upgrade from 16 to 32GB is part of the chip) - so working back from the M1 Max Studio that would put a hypothetical 16GB/512 M1 Pro Studio at $1400. (Yeah, that reasoning isn't cast iron but it's the best you can do with the available info).
So, yeah, that sounds like a reasonable intermediate option between M1 Mini and Studio.
However, remember, the Max supports one more external display than the Pro - and I don't think anybody knows what's happening with TB4 ports and PCIe or if the Pro could support all the ports on the M1 Max Studio (I thought the only Pro/Max difference was GPU cores, but the Max-only Studio has rather more I/O than on the M1 Pro & Max MBPs).
I think there's another way of looking at it, though: The M1 Pro is basically an M1 Max with half the GPU cores chopped off, resulting in a GPU that is more powerful than anything else in a thin & light laptop (with decent battery life) but isn't anything special compared to desktop PC GPUs (or even bulky gaming/portable workstation class laptops).
If price is not your #1 priority (and you're getting a Mac, so it isn't) and you're buying a desktop, so heat & battery life isn't your #1 priority, either, then how much do you need to "save" by getting what is, by Apple standards, a mobile-class GPU?