Hi Tim, the Zoom G5n is the largest version of what is basically the same platform, the G3 an the two smaller ones that I did echo patches for last year sound identical. My G5n just offers more options in numbers of patches available ag a time in front of me on screen. So the answer to your question is yes, the echoes are the same.
Because we now use Roland's new electronic drums that look like a real kit, I have recently been experimenting with 'in ear' monitoring and having all the band's instruments D.I. into the PA with a tiny back line to give us a quiet stage experience.
I'm going back to the Zoom on stage as I have got it sounding almost identical to what the Kemper Stage offers and it has a built in pedal, rather than having to add one as I do with the Kemper. I understand that the Kemper is a superior bit of kit, but what is important to me is what it does for me by way of he overall sound and the Zoom and Vox Tonelab LE still tick the boxes for live gigs.
I use my TVS3 in the studio and for any Shadows special shows that we may do, but for the pub and club scene, the Zoom does he job admirably.