I’m not sure it’s the best advice to upgrade your $4000 streamer to something more expensive. As always trust your ears and try to gear first before you buy if you can.
I have an G1 and G2 and I have heard fundamentally no difference between them.
I’ve heard all kinds of nuanced differences between interConnect and cables, however so it really depends on your entire audio chain. I would scrutinize your audio chain before I spent more money on the streamer because those are usually tiny returns for a lot of money. Thumbs up for power conditioning also for a DC blocker.