Valvoline max life synthetic

[BPBP440]

Valvoline max life (high mileage) Dexron VI synthetic is really cheap at Walmart. Like 18 bucks a gallon. Planning to use Synthetic Dexron VI in my fresh 727 rebuild. What is the big difference between the max life and the regular Valvoline Dexron VI synthetic. Max Life advertises special additives for conditioning seals and such. Any concerns with using this in a rebuild?

 

[5.7 hemi]

The synthetic stuff doesn’t break down like the others, it can run at higher temps and full synthetic fluid is over all better than regular fluid.

 

[BPBP440]

The synthetic stuff doesn’t break down like the others, it can run at higher temps and full synthetic fluid is over all better than regular fluid.

Thanks. Edited my original post for clarity. Both of the questioned fluids are synthetic.