Cubase 8.5 Pro Audio Engine

Has there been an improvement to the audio engine of Cubase 8.5 from Cubase 8.0?

I opened up a 8.0 project and it seems smoother in 8.5; maybe a bit of an analog vibe.

Can’t find any info on line or on the site that mentions any audio improvements.

Maybe in some cases it feels smoother? But I can’t say I’ve noticed any real difference myself?