Both Biologos/EC and ID make a stand for a “Big Tent” accommodating different views. The Big Tent of ID has been criticized for the scope of its accommodation, and IDers have responded with the counter-charge that Biologos/EC has a broad scope of accommodation itself. But these tents are not the same.
The Big Tent of Biologos/EC accommodates a range of theological views, within specific boundaries. While making the case that certain views are most likely, others are less likely, and some are only marginally likely, Biologos/EC is prepared to accommodate these various theological views on the basis that theology is ultimately a matter of interpretation and that orthodox Christianity has been prepared to accommodate diversity within specific boundaries. The accommodation is one of theology, not science. Thus Biologos/EC can rightly claim to be “doing theology”.
The Big Tent of ID accommodates a range of scientific views, within specific boundaries. While making the case that certain views are most likely, others are less likely, and some are only marginally likely, ID is prepared to accommodate these various scientific views. The accommodation is one of science, not theology. However, the problem is that it is prepared to accommodate views which are demonstrably scientifically false. Thus ID cannot rightly claim to be “doing science”.
The age of the earth is a useful litmus test. Biologos/EC categorically denies that the earth is very young, and agrees with the scientific consensus on the age of the earth. It is prepared to accommodate YECs theologically, though it does not compromise on the scientific facts, and tells them that their scientific conclusions are wrong and that this brings some of their theological conclusions into question. In contrast, ID is not prepared to commit to the scientific consensus on the age of the earth, and does not take a stand on the age of the earth, insisting that a range of views on the age of the earth are considered legitimate possibilities within ID’s Big Tent. Philip Johnson has even said the topic of the earth’s age is “not ripe for debate yet”. Stephen Meyer says it is a “subsidiary issue” and criticized Ken Ham for raising it in his debate with Bill Nye, and says the age of the earth is not a primary concern of the ID community. Jay Richards likewise says we should not focus on the age of the earth.
So Biologos/EC claims to be theology, and actually does theology. In contrast ID claims to be science, but does not do science. Further useful information can be found here.