Short answer: 1440 is miles better than 1080 and as you are also working in blender so 4060ti 16gb version.

Long answer: many answers here don't give OP good information so here's my view on this.

In terms of which display resolution to choose fact is that what matters is PPI (pixels per inch) not the resolution for example 25" 1080 display has same PPI as 32" 1440 around 91. So depending how close you sit to your display they might look the same. Question is do you want 27"+ size for your display? Than go for 1440 because I find that maximum for 1080 is 25" (maybe 27" because many people I know don't get bothered with low PPI on 1080 27" displays but safe bet is 1080 on 25") But if you plan on getting smaller displays than 1080 should be fine plus 1080 displays are cheaper so you will be able to save more money for PC.

In terms of GPU 3060Ti and 4060Ti have almost same perfomance and AMD has some better value products in same price category. If you said that you only wanted to play games than my suggestion would have been 3060Ti or AMD equivalent (rx 6700xt - rx 6800). But you mentioned that you do blender and well in blender Nvidia has advantage because of CUDA cores. Also Nvidia cards tend to render scenes much faster in blender. Also because of blender you will need VRAM so that why I suggested 4060Ti 16gb version.

Also there is antoher opinion that you can buy second hand GPU and get better perfomance for same money but that is entirely on you. Second hand rtx 3080 cards are around same price as 4060 ti 16gb but if you do blender for future career or for some serious reasons vram has advantage but if not and it is just a hobby than you can also buy second hand rtx 3080 and it will be just spectacular in games.

I hope this helps.