Well Ed-209 has its fan grille on it's front and seemed be vulnerable to high cal weapons (Not just the Cobra assault cannon, but it's own bullets) The T1 has lots and lots of such bullets..
My questions would be: "What its T1's armour capable of repelling?" (cause ED-209 does have those rockets...)
Also does T1 have the same "slave control other tech ability" that Skynet devices like the TX had? Or wireless comm ability? ('Cause as we saw in Robocop 3, Ed-209 was programmed by like an 11 year old girl...)
Also ED-209 has a habit of giving periods of time to it's opponent to comply usually (except for on the occasion of the OCP tower fight, in Robocop 1, granted..) this could be a serious ass problem against something that doesnt intimate with countdowns or the trademark roar of ED's, and that its as heavily armed as the T1 is..)
Both are probably fu**ed in a situation involving stairs.. 😛