2016+ clamshell

I've noticed differential sellers such as ECGS list 2016+ 8" clamshell differentials differently than previous 05+(2nd gen) units. Does anyone know if design changes were made or if this is just a way to make more money? ARB lists the same carrier and I can vouch that the busing bearing for the older design works in the 2016 diff, so this is a little suspicious.

I was also wondering why no one makes lunch box lockers for the front ends. I understand how a selectable locker would be a better choice, but realistically you can't beat the price of lunch box lockers and as long as you don't engage 4wd on dry pavement you'll stay out of trouble. Looks like the only choices are an ARB or an E locker which makes the ARB look cheap.