It's good to see another (close) Montrealer here.
ADF and ACF are not the same, although often misllabelled as one another.
ACF have kind-of claw-like front "hands". ADF are smaller. Clawed frogs will grow quite large. Dwarf frogs never grow larger than an inch and a half in length. Clawed frogs are illegal in California, but not here in Canada... The eyes are really how you can set them apart (besides the size). ACF have buggier looking eyes than ADF.
With the size of your tank, Dwarfs might be the best choice, but make sure you really are buying a dwarf if you do not want to end up with a frog way too big for the enclosure...
E.