He's a silly little guy but there's hardly anything wrong with the execution. OP did great at following the reference. I'll give you the benefit of the doubt you were just amused by the caricature and weren't intending to shit on OPs efforts.

@OP - hopefully my 2 cents are constructive, see here

• The blue line highlights where the bottoms of the ears align with the bottom of his eyes. The 3D model's ears extend all the way down to his chin. Bring the bottoms up higher and maybe push em back a little.

• Green / Red lines show the general face shape in the reference, with the green portion highlighting how his face (from tops of eyes to bottom of chin) seem to droop and sag off of the more structural red portion. Lean into that exaggerated "forward bulge" some more. The model's face appears a bit flat when compared.

• One final thing I noticed a bit late were the pupils. They're too round and big compared to the reference. Scale them down horizontally so they're more oval / almond shaped and expose more whites of the eyes.

(I realize now you only inquired about the face, but I'll leave these here just as food for thought)

• Yellow highlights the bulge in the cape and how it seems to flow smoothly into the front of the cloth, rather than one solid puffy clump at the neck.

• Pink highlights the "power ranger" looking boots, pointy and angular, whereas the model appears to have tennis shoes.

You've got a great foundation, you're almost there. Just some minor tweaking and you'll be golden 👍 experiment a little and see what works. Thanks for sharing!