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It might sound like a cop out, but they both feel similarly solid. Acrylic is a very hard material, whereas the wood is slightly softer and will be better at absorbing impact/shock than Acrylic, but they both feel solid and have a similar amount of flex, which at 5mm thickness is not much unless you really put allot of force into bending the panel, the Acrylic will break first (I think).
It might sound like a cop out, but they both feel similarly solid.
Acrylic is a very hard material, whereas the wood is slightly softer and will be better at absorbing impact/shock than Acrylic, but they both feel solid and have a similar amount of flex, which at 5mm thickness is not much unless you really put allot of force into bending the panel, the Acrylic will break first (I think).