Toshiba picture is nicer (more natural) than Sharp Quattron IMHO.

But it's subjective, I don't see what's the point in asking which is better cos both are good and different people will prefer different things.

Design, size, power consumption, picture quality, features, inputs, outputs, weight, thickness, black level, contrast, refresh rate.

These are all things which different people rank differently. Go to the shop and see the sets you want to buy, go read the specs and see which one satisfies your requirements.

No one here can tell YOU which is the best.