Reddit mentions of beyerdynamic Custom Street Headphones, White

https://www.amazon.com/dp/B00UK7ZTUY/

$49.00 before taxes.

looks nice, but im not sure if i can trust amazon here.. i hope its okay to post links https://www.amazon.de/dp/B00UK7ZTUY?smid=A1JK12XYOBOQH6&linkCode=df0&creative=22510&creativeASIN=B00UK7ZQXO&childASIN=B00UK7ZQXO&tag=geizhals10-21&ascsubtag=9HtjrXL5WQj3kEm1s2tHUw&th=1
are these which u mean?

I've got it narrowed down to three options. My budget is <100, I was considering the Samson SR850 or SR950 or the Beyerdynamic Custom Street headphones. My question is what benefits do the SR950 offer over the SR850? The 850s are only 30~ dollars and I need to know how much difference there would be in sound quality.

SR850 https://www.amazon.com/Samson-SR850-Semi-Open-Back-Reference-Headphones/dp/B002LBSEQS/ref=sr_1_1_sspa?s=musical-instruments&ie=UTF8&qid=1516410109&sr=1-1-spons&keywords=samson+sr850&psc=1

SR950 https://www.amazon.com/Samson-SR950-Professional-Reference-Headphones/dp/B00CBPJLFW/ref=sr_1_2?ie=UTF8&qid=1516410345&sr=8-2&keywords=samson+sr950

Beyerdynamic https://www.amazon.com/beyerdynamic-Custom-Street-Headphones-Black/dp/B00UK7ZTUY?th=1

What is the meaningful difference between these?

As stated, white over-ears in the budget category are going to pretty limited. Superlux HD661 are the only ones I'm aware of. If you can swing $80, the Beyerdynamic Custom Street looks like an option. You get more options in the $100-$200 range, like the M50X, Beyerdynamic Custom One Pro, and probably more.

Beyerdynamic Custom Street Headphone (White) https://www.amazon.in/dp/B00UK7ZTUY/ref=cm_sw_r_cp_apa_i_FPqjDbAW8AHQT