Nice. You're missing both URD cars, the Porsche 911 gt1 EVO and Mercedes cls gtr (Darche gt1 and Maures gtr) for season 1997. Also the Kunos Porsche 911 gt1 98 belongs to the group for season 1998.
yes you are right. Because Legions pack includes 2of the 3 you mentioned and the Merc is pretty similar, the pack fits very well together. And the quality is not bad either.
But it´s worth to think about replace them in the future. Thx for the feedback.