Max PSI | Thread profile

I use my mountain bike mainly as a commuter bike. As such, I ride mainly on pavement. I need to replace both front and reat tires. The new tires that I'm thinking of buying have a lower PSI rating than the old set. Would this lower rating, all else - weight and rolling resistance - being equal, cause the bike's ride to be more sluggish? (I ride with tires pressure set to the max PSI.)

Unless they're rated drastically different I'd just air the new set up to the same as the old. Generally, yes, the lower the psi the more sluggish the tires will feel.

My old tire's max PSI is 80 and when filling up those tires, I filled them up to a tire pressure of 80. My potentially new tires have a max PSI of 60 and, if I bought them, I would fill them up to a tire pressure of 60. Hopefully, I'm not being too redundant here, but would I notice a difference in the speed of the ride?