Yes they are very heavy duty machine and I recommend them 4 there price.
All things being equal: horse power, table size, saw size (diameter of blade. I would pick the powermatic table saw. Grizzly brand have been getting better but nat all Grizzly tools are up to standards.
Dude! Asking if a Powermatic is a good saw is like asking if a Mercedes is a good car. Powermatics are some of the top saws in the industry. They're made for constant hard industrial use, so if this is going in a home shop...well, hope your great-great-great grandson's kid likes to work wood.