While Drift Pro and Drift Series share some advanced features such as Precisely one-piece layup, Secure bead lock, Tubeless compatibility, Stable uniformity etc, they go with quite a lot of differences in terms of the aspects below.
Drift Pro Series
Yes. Toray T800 among other special materials used.
5 years standard and optional lifetime warranty.
Around USD300 - USD350 per rim
3 years standard warranty
Around USD185 - USD210 per rim
If you are going for fat bike rims or wheels applying the latest advanced technology but with a much better price, the Drift Pro Series stand out for you.
Or if you have a limited budget, wanting to have a pair of fat bike rims/wheels competent to deliver decent performance on major occasions, then the most cost-effective Drift Series support you there making your dream come true.