"This is very good bar pizza," reports Dave Portnoy, founder of Barstool Sports and affectionately known as "El Presidente" before giving Colony Grill cheese pizza an excellent 8.4/10 on his Barstool Pizza review (link NSFW, although it's not very bad either) of Stamford's most well-known pizza establishment.
("They wanted me to try the hot oil," he later reports, before giving it a 6.2 while noting "It's spicy, and I'm getting like a hot tamale on it.")
After he tried out Colony, Portnoy proceeded to give Riko's a whirl, with similarly high praise and a score of 8.2 (also NSFW): "I gotta be honest . . . Riko's can get in the ring with Colony Grill . . . I just don't know how there can be so much Colony Grill hype, no Riko's hype, these guys are the same . . . [it] makes no sense."
Of course, what Portnoy doesn't know, but many of our Stamford readers will, is that Colony and Riko's have a little history with each other. Around 2011, after working in the Colony kitchen, a father and son worked together with Rico Imbrogno to open up what was then "Rico's" (with a "c").
Lawsuits were threatened, and as far as I can tell were resolved out of court, as both Colony and Riko's operate today without much public acrimony.
Personally . . . I can't tell the difference. Both are pretty great. I am somewhat partial to Colony's however, as I was there on my birthday a year or two ago and some friends gave me a t-shirt of special counsel Bob Mueller in the Obama "Hope" portrait, which, independent of your politics, is a pretty funny t-shirt.