On paper, statistically speaking, they are essentially the same, I included Carlsbad in the comparison just to make it interesting. south Temecula is desired for SD commuters. otherwise it really just depends on the subdivision.
Estimated median household income in 2007:
Murrieta: $78,883
Temecula: $71,975
Carlsbad: $79,444
Estimated median house or condo value in 2007:
Murrieta: $459,300
Temecula: $468,000
Carlsbad: $690,600
Median gross rent in 2007:
Murrieta: $1,320
Temecula: $1,308
Carlsbad: $1,386
Percentage of residents living in poverty in 2007:
Murrieta: 4.4%
Temecula: 7.8%
Carlsbad: 5.9%