Some of the older GM pumps would whine like a banshee when using overly thick and/or non synthetic fluids.
And, unknown how similar the seal compatibility is... but wager probably not an issue for a 'name brand' or reputable product.
For a winter or colder climate, I'd probably take a 32 over a 46, and either if synthetic.
You'll find out soon enough if your choice was good enough for your vehicle and weather.