Cotton is a natural fiber. It seems to last longer (if good quality). Most quilters only use 100% cotton. It is supposed to breath with you. The poly will make ironing not needed.
It does not mean that the hoodies are better made. They can skimp on the stitching which will make seams rip out. You would have to look more closely at the workmanship. If the higher poly content one is better constructed, I would say buy that one. Higher price does not necessarily mean better made.
I have sweatshirts that I made that have lasted over 20 years. The seams have held together and the fabric has not stretched.