One thing I've been thinking about is that compared to the US, there is a small compression of the price range here in Canada.
US pricing
$699 - M1 Mac mini 8/256
$899 - M1 Mac mini 16/256
$899 - M1 Mac mini 8/512
$1099 - M1 Mac mini 16/512
$1099 - Core i5 Mac mini 8/512
$1299 - Core i5 Mac mini 16/512
$1299 - Core i7 Mac mini 8/512
$1499 - Core i7 Mac mini 16/512
$1999 - M1 Max Mac Studio 32/512
Canadian pricing
$899 (US$655) - M1 Mac mini 8/256
$1149 (US$837) - M1 Mac mini 16/256
$1149 (US$837) - M1 Mac mini 8/512
$1399 (US$1019) - M1 Mac mini 16/512
$1399 (US$1019) - Core i5 Mac mini 8/512
$1649 (US$1201) - Core i5 Mac mini 16/512
$1659 (US$1209) - Core i7 Mac mini 8/512
$1909 (US$1391) - Core i7 Mac mini 16/512
$2499 (US$1821) - M1 Max Mac Studio 32/512
So at the low end of the spectrum, the M1 Mac mini 8/256 is 6% cheaper in Canada than in the US.
However, at the high end of the spectrum, the M1 Max Mac Studio is 9% cheaper in Canada than in the US.
I'm not sure why they priced it this way, but I've noticed this in the past with other products too. At the low end you pay the same or more in Canada, but at the high end it's sometimes cheaper in Canada, or else there's less of a price premium in Canada vs. the low end. Not sure but maybe it's because the average income per capita in Canada is lower than in the US.
I'll admit that the difference between 6% and 9% isn't huge, but once you start including a 24 GB option for the M2 Mac mini, there is much less room to manoeuvre below the price of the Mac Studio, so from a marketing point of view, it makes sense to just delete the "high end" tier of the Mac mini altogether and replace it with nothing (as others have suggested in the past in this thread). Basically, that "high end" gets replaced with the 24 GB option. Or, as you suggest, they could have 8 GPU core vs. 10 GPU core models, but somehow I don't think they're going to that.
BTW, with these cheaper prices in Canada, I could see them raising prices of course, but I still think they still may maintain that small price range compression vs. the US pricing.
Anyhow, I'm happy I paid CA$1099 for that used M1 Mac mini 16/1TB I'm typing on right now. That's just a shade over US$800.
16 GB appears to be sufficient for my needs for now, so unless something surprising comes with the M2 Mac mini, I'm staying put with the M1 for the foreseeable future.