Well, I've played and heard an ac30, but do I have one here to a/b at the same time? NO. Is the Egnater close and does it have a rich, inspiring tone? Absolutely. For clean to semi crunch, the Vox module is excellent imo.
Of all the ac30's made over the years, you're really asking an impossible question because it may sound like one and maybe not another. If you like vox tone, you'll like the vox module. It's really that simple. If you want exact vox tone, then buy an ac30 and enjoy.