Steering wheels differences to the standard gti one is perforated leather and red stitching - you would be better off getting yours recovered in normal leather and red stitching as the holes fill up with gunk and doesnt look great to be honest
Gearknob only comes in 6 speed but the mk3 knobs 5 speed so thats probally where whoever it was got the insert
The handbrake is also perforated and red stitched
And FYI be prepared to bend over the counter for them i priced up all new alli trim and it was near £200 iirc