Advice on changing from stock 14 inch rims and spacing

To play it safe, there is a 95% chance this combo will fit that car perfectly:

Front: 15x7 with 4.50 backspacing and 225-60R15 tires.
Rear: 15x8 with 4.50 backspacing and 245-60R15 tires.

That's the size of one of the ones I was looking at. Except backspacing on the front says 4 1/8 backspacing on front and 4 1/4 back.

Also offset +3 and -6😳
Same size tires though!