From the article you link to -
Repeatedly in his hourlong speech and question-and-answer session, Mr. Bush said he would not directly criticize the new president,...however, he took direct aim at Obama policies as he defended his own during eight years in office.
On Guantanamo, ..., the former president was diplomatic. "I told you I'm not going to criticize my successor," he said.
Mr. Bush did not directly address Mr. Obama's response to the election in Iran,
Mr. Bush returned again and again to the economy, and sought to defend his own actions after the financial meltdown in the waning days of his second term -- Mr. Obama repeatedly has said he inherited that mess.
Asked by the evening emcee at the 104th annual Manufacturer and Business Association meetingif he finds the new president's policies "socialist," Mr. Bush started -- then stopped.
"I hear a lot of those words, but it depends on --" he said, breaking off. He later offered a more diplomatic assessment: "We'll see."
Compare those with Carter's critical statements and visits to countries that oppose US interests during the Bush Admin. Not even close..