I have personally not purchased from either because the shipping is weekdays before 10:30 and with school I cant do it. However I have a break comming up on the 16th of October so I will be making a nice coral purchase from them.
However after finding the site I was at my lfs and was talking with a a customer about some corals for sale. We agreed that the prices were high and I eventually found that he had ordered from both of the above places and asked if I would like to see the ones he had. From vivid he had a crocera clam, a neon green carpet anenome (thing was absolutley huge), a lobo brain coral, a kenya tree coral, and a beautiful purple tip frogspawn (who he said he would frag for me
) HE said the shipping was fast and packaging was great. All the corals were in great shape.
From Marine Center he said he purchased a bunch of SPS the most noticble be a green as well as a purple acropora whose color was outstanding.
From what I saw I would highly reccomend either site but cant from personal experience (atleast not until the 16th) haa