The AI-001's are natural indigo. Front rise is around 11". They feature slightly different stitching to the XX-003 (super thick thread round the fly and pockets), and pale blue selvedge. The denim is of a rougher, undulating, uneven texture than the XX-003.
The XX-003 are superb jeans too. Pink selvedge. Similar fit.
Otherwise, both jeans are pretty plain, with plain back pockets and rivets.
If memory serves, prices are around:
AI-001 = 45000 yen
XX-003 = 19000...