Actually more similar to Jaegers. Panzerfusiliers on their part at least have a bit of surivability due to larger squad size.
Not at all, Jaegers have a very slow firing G43 that insta-gibs models below a certain health, he's the reason for most of Jaeger's kills. That's nothing like Volksgrenadiers or Panzerfusiliers.
G43 Volksgrenadiers would just make them near identical to Panzerfusiliers, but with a smaller squad size and no vehicle snare.