For a start, she is the only member of the foursome who can remember the 1980s and all that big hair and even bigger earrings.
She is also a mother, to two girls - Ruta (8) and Priscilla (6). And the other three defenders have got great first names in Storm, Sulu and Phoenix, while Rasmussen is stuck with plain old Rachel.
''I might have to get the girls to give me a nickname - something more exciting,'' she joked.
Perhaps the most important difference, though, is Rasmussen is the only one who is likely to start each week. The 28-year-old is the leader of what is a young and relatively inexperienced defensive group.
It is her role to direct proceedings at the back and to help generate the turnovers the team will need to win more matches.
So far, Rasmussen and her charges have come up against giant Jamaicans Romelda Aiken and Carla Borrego and English shooter Jo Harten.
This week, it is a couple of hardened campaigners in Pulse shooters Donna Wilkins and Caitlin Thwaites. Stopping them getting the ball in their hands is the No 1 priority.
The Steel's attack end has been functioning superbly. Jodi Brown, who leads the competition in assists with 63 in three games, has provided the Steel's own towering Jamaican, Jhaniele Fowler, with a steady stream of ball.
Fowler is the competition's leading scorer, with 150 goals, so the Steel knows if it can restrict teams to about 50 goals, the chances of winning increase.
The problem for the Steel is it has conceded 184 goals at an average of more than 61. Improvement is desperately needed.
''I think we've come a long way as a unit since the pre-season. There is still plenty to work on defensively, but I think we're improving,'' Rasmussen said.
''We're all strong at reading the play and just need to keep consolidating and working on those combos - and hopefully we'll be able to turn over a bit more ball.''
Rasmussen transferred south from the Mystics this season and is enjoying the opportunity to get more consistent game time. She was mostly restricted to making an impact from the bench for the Mystics and is relishing her leadership role within the Steel.
''It is really exciting for me and my own development but it definitely puts a lot of pressure on me, as well, to make sure that I'm performing.''
Rasmussen is ''naturally quite the chatter'' on court and Sulu Tone-Fitzpatrick is also very vocal. Phoenix Karaka and Storm Purvis can be a bit quiet, Rasmussen said, but are working on communicating more.
History is on the Steel's side. The franchise has won eight of the 10 games between the teams. The Pulse, though, has won the last two encounters, including a 58-50 win in Dunedin last year.
Both sides have one win from three games this season, so a win will help one of the teams hold on to a place in the middle of the table.
Pulse captain Katrina Grant, who played 26 matches for the Steel in 2008 and 2009, will play her 65th ANZ Championship match.
The Pulse feels a lot like the old Steel. Its wing attack, Liana Leota, played 54 games for the Steel, and defender Te Huinga Reo Selby-Rickit amassed 40 appearances for the Steel. Wilkins is next on the list with 27 caps for the Steel, and shooter Paula Griffin clocked up 13 games.
Pulse coach Robyn Broughton led the Steel for its first four years and left in controversial circumstances when the franchise decided to advertise for a head coach.
Consequently, the game has been billed as a bit of a grudge match. The Pulse looks stronger on paper and has the advantage of playing at one of its home venues.
The Steel, though, looks to have improved from last year and will be targeting the match for a win. It could come down to which defensive unit generates the most turnover ball.
ANZ Championship
Steel v Pulse
Where: Arena Manawatu, Palmerston North
When: Tomorrow, 7.20pm
Record: Played 10, Steel 8, Pulse 2
