Logo in 37xx is a 800x480 image in a 1024x512 frame. LOgo in a 34xx is a 800x480 image in a 800x480 frame. Yes, logo in 37xx sh9ould be bigger than the logo in a 34xx but the size on your 37xx is way to high. Replace logo with GIR_Editor then check the final size of the logo.bin. There should not be that much difference.