I might be a bit of an idiot, but Realtek and Broadcom seem to occupy basically the same spot in my brain. They're two companies that do nominally similar things and I'm not smart enough to always differentiate them.
I could totally see someone hearing a vaguely similar name working on vaguely similar products and getting them confused.
I could totally see someone hearing a vaguely similar name working on vaguely similar products and getting them confused.