Unfortunately you can't conduct business activities on the Ham 2M band.
About range comparisons between MURS and FRS radios in the open I don't expect a huge difference between them. However if one is using external antennas that would be different, but FRS that isn't allowed to use external antennas so the tests would be between MURS and GMRS radios.
From a very basic technical view point the typical antenna on a GMRS HT is nearly a quarter wave long, about 6 inches, and the body of the radio is large enough to make a fair ground plane.
Compared to a VHF radio around 150 MHZ where a quarter wave antenna is 18 inches long so radio body is a poor ground plane. It's often mentioned the typical 6 to 8 inch rubber duck VHF antennas have a negative 5 to 6 db gain relative to a quarter wave ground plane antenna.
Without going through the math using quarter wave ground plane antennas for VHF and UHF the VHF radio has approximately a 9.5 db (a factor or 9) advantage due to "path loss" over a UHF radio. So for a 2 watt MURS radio the range would be equivalent to an 18 watt UHF radio with line-of-sight operation. Now using just the rubber duck antennas the over all gain difference is reduced to around 3 db more or less. In practice you might not even notice it. IMHO this is sort of the way I see it.