Very hard to compare because there are loads of variant's of laptop GPU models.
I would bet my house they are using some high efficiency variants of those GPU`s with lower power to keep heat down.
The high power variants are usually only found in much bigger and very expensive laptops.
And their advertising often does not mention it either.
I would just go with the 4070 one.
Loads of YouTube reviews comparing old and new Zephyrus. Jarrod'sTech has got plenty of benchmarks as an example.
The G14 is an Ultra Book so is somewhat compromised in either 2023 or 24' guise if raw gaming performance is truely sought, in which case ASUS Strix/Scar is for that. However it does do ultra book gaming incredibly well vs the competition plus productivity and media / creativity due to nvidia studio benefits of RTX.
None of the Ultra Books get full power 4070/4080 but the 4080 (125w) is better as there is only a 90w 4070 in the 2024 G14 so broadly comparable to a c140w 4060.
Dig through a few more reviews and the 24' 4070 is only a few fps ahead of the 120w 2013 G14 r9 4060 version which is significantly cheaper than either.
So i am thinking about swapping my XPS 13 for a G14
You know, I had potentially overlooked the XPS13 element a bit too much here.
The XPS weighs c1.2kg and is pretty compact. Having owned XPS 13s (2021&22) the change to a 2023 G14 would be pretty noticeable if you value the productivity / sme focus of the XPS. Depends how much you value the size/weight/design.