LQ9 is higher compression. 98+ Camaro will be LS1 small valve heads, fine on a 5.3. Don't quite match the bolt on potential of a set of 243's on a 6.0.
dont forget to mention the difference between perimeter and center bolt valve coversJust a quick note, the 98+ F body heads and the 243 (LS6,LS2,799) heads all have the same size valves. The 243 ports are a definite improvement over the predecessors youre right there for sure.