Only you can determine suitability for your needs.
Nano-texture glass, with its reduced screen reflections, shows its primary benefit when being used outdoors, or in very bright indoor environments where you may experience reflections from bright light sources. If intending to use the iPad for colour grading, you are perhaps more likely to be using your iPad in environments with much softer or subdued ambient lighting.
Some users comment that nano-texture screens produce less sharp images than the standard screen - this sometimes being considered an undesirable compromise.
Third-party testing has demonstrated the nano-texture glass to be much less resilient than the standard glass option. As such, the nano-texture finish is more vulnerable to damage.
If you opt for the nano-texture finish to benefit from the reduced screen reflectivity, be aware that using a screen protector will remove all benefit gained though purchasing the nano-texture glass - as you will see reflections from the screen protector itself.
If intending to use a screen protector of any type with your iPad, you would be best advised to opt for the standard glass screen.