Here is an example of square vs. staggered.
My winter set up is square. All four tires are 225/45/18's
My summer set up is OEM staggered. The front tires are 225/40/19 and the rears are 255/35/19.
The sizes you are talking about appear to be OEM staggered for a RWD car like mine, though I don't recall the exact factory offsets and you don't mention your wheel size.
I think the tolerances are known for how much difference the AWD system can handle for tire circumference. You'll need to put the sizes into a tire size calculator to make sure what you want to do fits within those specs.
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