In roughly the last six months, four resorts have opened their doors in Southern Nevada. The most recent one — the M Resort at St. Rose Parkway and Las Vegas Boulevard South — has a lot more in common than you might think with the previous three, the Eastside Cannery on the Boulder strip, Aliante Station in North Las Vegas and Encore on the Strip. M, which opened March 1 to rave reviews, has most frequently been compared with another relative newcomer to the market, the Red Rock Resort in Summerlin.