I dunno, im pretty sure that the playground scene wrapped up differently when I saw it on TV. And im pretty sure they even showed a clip of the original at one point. I mean, the whole introduction of her (well her giving her name) was different, and then it went into an extended (at least i think it was extended) scene with the King Pin. In the theatrical was there any talk of her having to go cause her body guard was here, and she thought she had lost them at the coffee shop?
I'll check my theatrical cut DVD right now.......and you are correct. The theatrical scene simply cuts to the Kingpin after she says "My name's Elektra Natchios. Hmm." The DC has the additions that you mentioned and ends with Matt looking at his watch and noticing that he's late.
As far as the DVDs go, the DC only has a commentary and a featurette. Everything else, including the stuff you saw on FX is only avaliable on the theatrical cut.