If it were me I'd go for the one with AVS, Lexus dealers are a pain in the proverbial and don't deserve to sell any cars due to the non-discount attitude/policy they seem to run. I couldn't get a cash discount for my car when I bought it but they gave me a mug! Was that symbolic?
I would ask the dealer to send you a photo of the engine bay with the top of the struts in the picture because I have found that many get it wrong about having AVS so would definitely worth double checking. Or phone them and ask if there are any wires coming out of the top of the front struts.