So just an update to this, I end up springing for the iPhone 13 in pink for both girls. $10 a month for the 13 vs $5 for the 12. But I figure the bigger battery, better cameras, double the storage and a few other improvements made it worth the extra cost. Plus with the A15, will help them last longer once they graduate into a full phone for them to use
Worked out in the end for cost as both I got both my wife and older son into cheaper plans with more data during the Black Friday sales. So a win win overall
Now time to go case shopping lol