I'd say the light twin is more dangerous during the takeoff phase and then safer for the remainder of the flight.
Personally speaking and being coldly analytical about my own shortcomings, I'd likely make different mistakes in a twin vs a single. With a twin, I'd likely press on after EFATO & try to keep flying when I'd be better off chopping the power on the remaining engine & landing ahead; or be flying overweight
; with a single, I'd likely be flying where I've no business being without a second engine & have no safe options for a forced landing
.
Fortunately, my propellors have always kept turning and advancing age seems to bring with it a greater sense of caution - and responsibility.