The aquablue specials are still blue-ish but has more white in it than the coral plus does, which is still technically a "white" just a deeper blue than the aquablues specials. The blue plus ones are ALL blue so I agree with the above, you might need more "white" in the tank.
When I had my big t5 unit I had 4 aquablue specials, 4 blue pluses and 2 purple pluses and found it cast too much of a purple hue rather than a blue hue. I ended up going with an even split of specials and blue pluses.
This is the split 50/50 whites and blues
Still looking for a shot of the purple bulbs lol