Yes, the only differences as far as Disney is concerned between the annual and and seasonal passes are the parking and blackout dates for the seasonal. Both are considered annual passes for the purposes of all passholder events. If a castmember tells you differently, immediately get that person's name and go straight to guest services. In fact, Disney usually tries to have the passholder events that are inside the parks during times when the seasonal passes are not blacked out so those passholders may go as well. If you show up at one of the passholder lounges with a seasonal pass during the times that the seasonal is blacked out, they may be surprised that you're there, but if you purchased a one-day ticket or some other ticket in order to get into the park that day, and have your seasonal pass, they should let you in, because all persons with passes, regardless of whether they are annual, premium annual, or seasonal, are considered "passholders" by Disney. The tickets which do NOT qualify you as a "passholder" for Disney are the Ultimate Park Hopper (or whatever the current name is for the length-of-stay tickets on hotel room keys, they seem to change the name every few months LOL), Park Hoppers, Park Hopper Plus, and One-day tickets.