Streetglow is like Gibson guitars and Optx is like Epiphone guitars. Same company, same owner, same designs, but one is cheaper than the other because of quality level. Optx usually run $15 for neon tubes, Streetglows are $37 for neon tubes. Its all name and quality.
Go Optx, they're more affordable (notice I didn't say cheaper) and they're still good quality, since they're made by one of the best.