We'll I'm not sure they have 4 LEDs where mine had 1 as one had broke so I wanted it really lit with blue but I wouldn't say so the only mods I made on the orca was the lid plastic but may have to do that with my d&d at one point but the orca was only a year old were as the d&d is a few ,and it had no LEDs at all and Had to put new fans in it as they were quite loud after abit
But up to now the d&d is Well built , the fans are quite and the lids ok but in a year or so I may need to get a new cover glass that's all and the pump seems more suitable to the tank size were a lot of people upgrade the orca ( I did )
So to answer your question
The only mod I think you would need to do would be led moonlights if you want them really light and blue but that's just sticking some in the hood off eBay for around £10 but you may be happy with the way it is
I should point out that my orca was a few years ago so they may have drastically improved things (except the pump a lot of people still do this )
But all in alll i personally much prefer the d&d but I would gladly use the orcas any day to so they're both good tanks but I would go d&d
Hope that helped abit bae