Bush lowered taxes and used the power of the state to hyperinflate an economic bubble that was already growing when he took office. The housing bubble, with all it's government subsidies, state mandates, and private sector incentives (like being able to dump sub prime loans onto government GSA's), drove the economy under Bush. It was great while it lasted but like all economic upturns dependent on government actions, it wasn't based on reality and eventually collapsed because reality can only be avoided for so long.
Obama's attempts to create his own econmic bubble have failed, despite throwing trillions of dollars at a myriad of "shovel ready" programs, including hundreds of billions to the now defunct solar companies, and his suicidal policy of flirting with hyperinflation could be even more disasterous to the country than when the housing bubble burst.
Romney will be more business friendly than Obama but they are both still Progressives, meaning they both see the state, rather than the free market, is the only possible "solution" to economic downturns. Any economic recovery driven by government intervention/manipulation of the economy is doomed to ultimately fail and do more harm than good.