Is there a particular reason that you want an alternative? Why not just buy the Wera? Here's a recent topic with some discussion -->
https://www.garagejournal.com/forum/showthread.php?t=392024
I bought the Harbor Freight Taiwan Pro for around $8 after never expiring $5 off coupon. It's nearly the same as the Icon which costs $20 more. They're clearly made in the same factory from mostly the same parts. The extra $20 is for marketing and a longer rubber handle.
This is a common question with Wera and Knipex and many other brands. The only difference is the packaging.
SB is an abbreviations for Selbstbedienungsverpackung (German for self service packaging). If you go on the Wera website, you'll see this photo for the "SB"