Having dealt with both, this could not be further from the truth.
I ordered my can with the BT braided lines, and they are just a tad too small. Many others have experienced the same. And they aren't really braided, either. The speedlogix lines are actually adjustable, real steel braided lines, the BT lines are a complete joke. It's a nylon line, with a cosmetic piece that just sits on either end.
Speedlogix lines are more expensive, however they can be opened up on either end to easily take them on and off, and secured tightly with a clamp that comes installed on both ends. The BT lines just press on, and even with a hell of a lot of elbow grease, lube, a heat gun, it was just too small to fit over the ends.
If you do a search, you'll see a thread I posted about it, and others.
Went on quite the rant there, but for the love of god, buy the speedlogix braided lines, stay far far away from the BT ones, they are junk.
Have been getting all my braided lines from SL and besides the great service from Mikey and Lisa, the products are about the best on the market. The quality is about the best. Been buying from them for a few years and have not had a single issue. Can't go wrong there.