i have a 96 teg hatch and ive ridden in a 98 civic lx 4 door. the teg is a little bigger inside. but im sure if i had ridden in a civic hatch, itwould be alot more similar. but either way, i think that the integra's dimensions are slightly bigger.
also, no civic is going to be fast out of the box, just keep that in mind. im not trying to promote integras or anything, cus theyre not fast out of the box either. i think the teg looks better than the civic and they are a little rarer. the teg will have a nicer interior. if your looking to do a swap, go for the civic.