Adobe Premiere Pro CC 2018 Hardware Accelration

So ive notice when you go export from the new updated Adobe PPCC2018 there is an option for Hardware and Software Acceleration. I know Adobe has always used CUDA and OpenCL to help with colors but this seems to have really improved exporting. I am exporting to H264 vbr1pass since none of the others let me select hardware

Couple QUestions:

Why does it say my hardware is supported in VBR 1 pass, but not CBR or VBR 2 pass? Quadro M3000M

When you do the queued export and AME opens up, it looks like you have the old options for Hardware OpenCL and CUDA is this the same as the non queued export?

Watching Task Manager it seems like the GPU get used a good bit more when doing the non queue and directly exporting from Adobe Premiere vs Queuing it up in AME? Am i just making this up? Ive never seen the gpu hit over 50% in AME and it hits 80-90% easily when doing Premiere Pro direct export.

I am going to do some timed testing, but i cant find the export log for non queued exports, just the queued ones in AME.