Graphite is superior over fibreglass. Its lighter, more sensitive, has better pulling power, doesnt double over when fighting a fish, casts futher, etc. The only true advantages a glass rod has over a graphite is that its more resilient to breaking from knocks and scratches and tends to be cheaper
But if you look after a graphite rod, it should last you a very very long time
I use both, like both too, but for comfort and fish hauling ability, graphite would be my preference
Cant comment on the rods, never had a 14ft or 15ft purglas