u made the right decision...... 1.5 is a beast as compared to 1.3 in performance. With 5 people on board, you dont feel any lag in performance with ac on in 1.5 at acceleration or at high speed. Fuel economy of 1.5 is same as of 1.3. (getting about 14/L in city with ac on in my aspire 1.5)
Cosmetically, both 1.3 and 1.5 are same (NOT talking about aspire 1.5 which has shark fin antenna, leather seats, fog lamps, alloy rims, android with back camera etc)