Nothing feels or shoots like a good 1911, but the P345 does feel good. It feels even better with a loaded magazine installed, which helps its balance. The grip design exceeds that of the P89 by leaps and bounds, features a lot of molded-in checkering, and has a slimmer portion up top where a shooter's thumb and trigger finger lie.
While the overall length of the 1911 is just about 0.75" longer than the P345, the 1911's slide is only about 0.2" longer than the P345. At just a smidge over four inches (mine measures 4.05"; Ruger calls it 4.20"), the P345's barrel is almost an inch shorter than the 1911's five-incher.
The right side of the P345 is marked as such: "45 AUTO" and a Ruger proof mark on the right side of the barrel; "STURM, RUGER & CO. INC." and "SOUTHPORT, CONN. U.S.A." on right side of slide below the ejection port; and a metal insert at the top rear of the polymer frame contains the serial number. The grip is mirror image of the left side, with the same RUGER name and red phoenix logo.