I've done research and listen to clips online comparing the two setups, but i want to know which one sounds more like a g35.

I've done the stage1 myself, but i would like it a tad bit louder... but i want to know if it would still sound the same but louder if i do stage 3? or would it sound different?

 

there are countless threads on this.
Every ones ears are different.
if you want it a tad bit louder, then go ahead and get the stage 3 done.
/thread.

I'll even help you.
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/thinking-getting-stage-3-a-780989/
https://acurazine.com/forums/showthr...ighlight=stage
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/stage-3-mod-780268/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/cai-plus-stage-3-qs-778647/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/anyone-done-rv6-v3-stage-3-stock-exhaust-776425/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/after-research-went-stage-1-exhaust-777135/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/stage-4-owners-773232/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/stage-3-%3D-0-hp-gain-but-catback-%3D-10-hp-772715/
https://acurazine.com/forums/showthr...ighlight=stage
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/lookin-do-stage-3-exhaust-767140/
https://acurazine.com/forums/3g-tl-performance-parts-modifications-112/stage-3-exhaust-done-759536/

Would you like MOAR????????

 

Nissan 350 Z is the closest you'll get to the "cow" G35 sound...moooooooohhoooooohohoh

you can't make a car, sound like another car when they have 2 differently designed motors.
Difference in head design and flow...G35= traditional headers. TL=cast in-head.
Different strokes for both, etc.