OK, to those who are concern. I can answer my own question.
There are huge price difference between the two. RE seems to be double the price than AO on the market. Besides the price, there are only three differences between the two.
Nose piece stem: RE and AO has different nose piece stem setting. AO seems to fit my face better. But this is a personal preference.
Temples: AO has "AO" logo emboss on the front of temples, no wording on the end of temples. RE has no logo on the front of the temple, but has "Randolph Engineering" wording on the end of the temples.
Glass: Both weight the same, so I believe both companies are using glass lenses. AO has no working at all on the lens, RE seems to have a white "RE" on the left lens.
As for quality, I cannot tell the difference at all. My AO is matte chrome finish, my RE is polish gold finish. I have never compare same finish head to head but from what I have seen it is pointless. Personally I like RE subtle logo treatment on the temples better but consider the price difference, AO definately is better value. After comparing both, I kinda feel stupid paying double (online will be triple of the price difference) for a RE.