I don't have the tilt and adjust, but it doesn't look that much different to the original AHR which we have used for both our kids and absolutley love! The head support isn't bulky or annoying for the kids, in fact my daughter loved rocking her head back and forth between them to put herself to sleep

Besides then we upgraded her to the Recaro Young sport which has a massive head support to the point that it restricts vision out the window - and it still doesn't bother her
All the padding can get a bit hot in summer btw, but we just undress our kids appropriately when they are in the car. The bonus is that they are so snuggly and comfy in there

Also keep in mind that as they get bigger some of it comes out.