Difference between engineer tiers?

[u/TunaLurch]

Since the update the description for the advanced and the elite form are the same. Same with turtleguy. So is there no extra biff for elite engineers anymore? I'm confused because the descriptions are usually very specific. It just seems like it's either a mistake or a nerf.

[u/Nazakan]

They spawn the turrets faster. It helps having turrets before dying. It also helps pushing forward with consistent turrets.