I thought the A1500 was just a towerised A1200 with a micronik Z2 busboard ??
No the A1500 was sold in the UK only as far as I know. Long story short it was to try and blow the after market A500 desktop case kit (Checkmate) out of the market with Commodores "official" A1500, which is an A2000 with an extra floppy drive and a sticker over the "A2000" badge.
Hardly see the point why they went to all that effort as the desktop kit was far from a good seller.