Same tires (and wear) on axle - due LSD diff on it (also reason, why in case of punctured rear it's advised to put in back front tires but spacesaver spare - in front. Not an option for those who installed staggered sized wheels/tires). I guess rears wear faster for DD only car. Imho less so on tracked car. Still, one can always rotate tires to even out wear over time, so that whole set arrives to replacement at same time.
@
ItsReiko: Repairing punctured tire was not an option due structural damage of carcass or due stock tire repair gunk used? If later .. suggest to "upgrade"/replace tire repair kit with normal spacesaver wheel. It's usually cheaper (vs purchase of two new) repair (if it's repairable) punctured one, and wear will stay same.