Yes they detected 2 strains, but one they found only a few samples of.
Researchers analyzed 103 sequenced genomes using strains from China, and found that 70% of strains were one type, which they called "L." The "L" strain was more aggressive than the remaining 30% of strains, which were dubbed "S."
Dr. Stanley Perlman, a professor of microbiology and immunology at the University of Iowa who has researched SARS and MERS, said that the new paper didn't prove that one strain was more aggressive or faster spreading than the other.
Note: this is from a week ago so there may be newer updated data