Hi guys, I am attending a conference at downtown Phoenix, from October 13 to 17. The hotel that I am looking for is Renaissance Phoenix Downtown Hotel. I can book a room from the conference website for $200 per night, but the same room is available on Marriott for $300+tax. I have a Marriott Chase card and like to book directly from Marriott for the bonus points. Is there any way I have them to match the $200?

Thanks