Pretty sure you're robbing Peter to pay Paul here. The smaller the tire the more revolutions it has to make to go a mile. I think that would cancel out any range increase from reduced rotational mass. I don't know if necessarily translates to EVs but for ICE vehicles, a slightly larger tire yields fewer revs/mile and lowers the engine speed. Theoretically increasing fuel economy (range). If it actually does, the benefits are likely negligible and not measurable. With my last ICE car I swapped in a transmission with taller gearing (dropped freeway RPM by about 300. I expected this to net me a couple extra MPG. I took extensive measurements before and after. To my surprise, I couldn't find a statistically significant change in freeway fuel economy. The point being, this was a drastically more significant change than playing with wheel sizes and I was unable to see a change in fuel economy beyond the margins of error of measurement, so I would be shocked (pun intended) if you could measure a difference in range based on using two slightly different tire sizes. I would speculate that air pressure and the rolling resistance of the tire would more greatly affect range than the size of the tire. Due to the properties of rubber, a tire that has good winter traction will be a softer rubber and have higher rolling resistance reducing range. It's really a question of how much range are you willing to sacrifice for winter traction. More range = lower rolling resistance = harder tire = less traction. Less range = high rolling resistance = softer tire = more traction. Most range and most traction is a unicorn that doesn't exist. As Scotty would say, "You cannot change the laws of physics!" An actual winter tire will be heaviest and softest and hurt range the most.
In northern Ohio I don't need winter tires. They salt encrust the roads and clear them fairly quickly so 99% of the time the worst case is just cold wet roads with a little slush. There's probably at most half a dozen days a year when I would have to drive thru snow where a true winter tire would be better. I look for an all season tire that has excellent wet traction and snow traction ratings. Cold wet traction is the most important to me. The problem with summer tires and many supposed "all season" tires is that the rubber gets hard when it gets cold say below 40 and you lose wet traction. Years ago I had Falken Ziex 912 tires. Hands down the best tire I've ever had for sub freezing wet roads. Problems is they were also probably the worst tire I've ever had in the snow. I've also had General Altimax RT that had decent cold wet traction and very surprising snow traction. I had no problem with these going thru snow deeper than my ground clearance. The drawback is that these tires were heavy and seemed to hit my fuel economy a little. I don't remember which Michelin tire it was but it had the best balance of cold wet traction, snow traction, and treadwear. Unfortunately it had the Michelin price tag to go along with it. Falken came out with the ZIEX ZE950 tire to replace the 912s. They were rated very well for wet and snow traction so this is what I decided to go with for my FFE "winter tires." Since it's not fair to compare a tire's performance on very different vehicles I can't really make and direct comparisons to previous tires I've had. The cold wet traction is an order of magnitude better than the OE tire. I've only had 2 snowy days of driving with them but they are also at least an order of magnitude better with snow traction. I'm sure an actual snow tire would be even better but I can actually leave traction control on and be able to go from a stop without taking 10 minutes to get moving.
I would rate the snow traction as good or acceptable. keeping the wheels from spinning is still difficult but that has a lot to do with the FFE design of having only 49% weight on the drive wheels. I will still turn off traction control when I need to pull out into traffic so than I can accelerate quicker but, at least I don't have to turn off traction control when the snow flies like I did with the OE tires. It's hard to get the back end to break loose. When I pull the E-brake the back slides less than half as far as the OE tire would slide. So far I am very please with the winter performance of these tires. This summer I will do some range comparisons with the OE tires. I'm curious how much of a range penalty these tires cause. Oh I almost forgot the Falken tire/ Volvo wheel is 3lbs lighter than the OE wheel/tire so I have 12 lbs. less rotational mass. My OE tires still have about 65-70% tread left.