Those are both low mileage for a 2014, and good that you're staying away from the base model. Lux, Tech and SLX are the only way to go. One thing to note, the Tech with bald tires at 25000, they are likely bald for a reason. I think the stock tires if treated right will last up to 35k or more. I replaced mine at 20k simply because I wasn't impressed with the tread, bought it with 10,000, so gave it a good shot. but even at 20000 there was plenty of meat left on it. Meaning, the previous owner must have been regularly pushing it if the stock tires are bald.
Note too, if the car is NOT Kia Certified, the 100,000 mile warrantee does NOT transfer to a subsequent owner. So if these are 2014's, you have maybe 1-2 years left on full warrantee, then that's it. It might help with negotiating to point out that without CPO you want the better price. Most sales lots fail to mention this to you, you knowing it gives you a little leverage.