The Razer will perform very much like previous Razer laptops with the 4080 Tier GPU. From memory they don't run Max TGP variants of any of the GPU's thus end up somewhat middle of the pack (in the game GPU tier). 5090 model will likely be completely pointless for purely gaming as it will be heavily power limited (The 5080 and 5090 already seem power limited at max TGP already). This was generally the case with the 40xx models and nothing has really changed efficiency wise in the 50xx models.
Ideally unless you specifically want the thinner design of the Razer models (same for things like the Asus Zephyrus as well), I would try and find a model with the X3D chips from AMD (9955HX3D IIRC).
Following on from my post above the MSI has been returned. Could not get the GPU fan to not run above 6000 fan after around 5 mins of gameplay with the TGP @ anything over 120w. Ignoring noise levels though and the 5070Ti was very impressive. Performance is very much in line with the previous max TGP 4080M and likely only a few % shy of the 5080M. It should be noted that this is more down to the 5080 being power limited (well voltage limited) at Max TGP rather than it being "bad in anyway.
Only issue seems to be price for most of the models available.
I recall paying £1900 for a max TGP 3080 16GB specced Legion 7 whereas the equivalent now (with at least a 5080) is waaaaaaay more than that (like £1500+ more.... w.t.a.f?!).
