The full-back thinks coming out on top over six games is a trickier route to the top flight and makes the play-off system less favourable to Championship teams.
Whereas the Steelmen have to play just two games including a tie at Ibrox, a ground they haven’t won at in 18 years.
Foster, who missed two months of the season through injury, told Rangers TV: “I think that the way that the Play-Offs are structured is not favourable to the teams that are in our division.
“So to get up that way would be a success and would cap off what has been an ok season.
“It’s always going to be difficult having to play six games but we’ve come through these four already and we’ve shown that we’ve got good quality.
“It’s a massive credit to the players inside the dressing room that we’re now at this point.
“When you look at some of the boys who have played in all of the games like Nicky Law, who has played something like 51 or 52 games, then it has been very tough and a long season for those players.
“For myself I’ve been out for a little while but it’s just nice to be back involved and getting games.
“Whilst I’m really tired after the games I’m enjoying that feeling of having worked hard and on a personal note this a plus point for me.”
“I’ve not really trained much because we’ve just been getting ready for the games but it’s nice to be winning games and I’m enjoying it at the moment even though it is very difficult.
“When I joined the club a couple of years ago what I wanted to do was help the club get back to where they should be playing.
“Obviously we wanted that to be done already but it’s not been the case, so this is our chance to salvage something from the season and personally that would be as great an achievement as it would be for the club.”
Rangers hung on against Hibs to reach the play-off final with a 2-1 aggregate win on Saturday.
A late scare from Jason Cummings had made for some nervy final moments at Easter Road.
Foster continued: “We knew what to expect from the game against Hibs, we knew that they would have a lot of the ball and I don’t think that Cammy really had too much to do.
“The only times that they really caused us problems was right at the end when they were throwing the ball into the box.
“They never really carved us open or created any clear cut chances, which is a good thing for us.”
“It was a bit hectic in the opening stages; they pressed us really high up the pitch and never gave us any time or space on the ball.
“It took us a while to settle into the game but once we did I felt that we had a couple of spells where we kept the ball in the first half.
“They threw everything at us, but I think that we were very resilient and never gave up too many opportunities.”