The BME is the most compact at 10.5" plug cap to plug cap. The DA is larger, and the MVVS is larger still at over 12.5" plug cap to plug cap. The BME is also the lightest at 3.90#. The DA is next at 5.8# and the MVVS is heaviest at 6.75#. All weights are without ignition. Power-wise, the BME is stronger than the DA, and I havent heard reports on the MVVS performance.