Measured by the amount of radiation released at Fukushima and TMI, Fukushima is 160,000 times worse than TMI.
According to a French agency and the Institute for Energy and Environmental Research (http://www.ieer.org/), as of March 22nd, Fukushima had released 2.4 million curies of iodine 131 or 160,000 times the best estimate of the release at TMI. Also Fukushima is estimated to have released half a million curies of cesium-134 and cesium-137.
As of March 22nd, the Fukushima releases were estimated to be 10% of the radiation released at Chernobyl. Unlike Chernobyl that had one reactor releasing massive amounts of radiation, Fukushima radiation releases are coming from 3 reactors plus 4 fuel rod cooling pools.