If the JetStar and Tiger are pricing the same, I'd be all over the JetStar. I've flown both and Tiger is a really packed plane. The least leg room I've ever experienced. JetStar has pleather seats and I was lucky enough to get Row 1 on SIN-HKT. On the HKT-SIN leg, Tiger lost a bag for our entire stay in SIN (4 days) and we got it back 2 hours before our plane was leaving SIN-NRT.