I am not trying to implying the RCDs aren't highly capable. But the two other versions of the exact same type are both being classified as FFGs in their navies. Beyond our desire to puff up, what makes the RCD categorically different from the other two?
I will disagree a tad that the number of VLS doesn't determine type. VLS alone? No. Total firepower? Kind of. And basically everything called a destroyer these days has a lot more of everything including VLS.
Sure. But even ignoring the creep in classification these days, the RCD is still coming online with less than the very first Burke.
I think inclusion of AEGIS makes a huge difference. Sure, call them a Frigate, but don’t conflate Destroyer with Air Defence Destroyer. We don’t need a ship optimized for area air defence only.
Having said that, one of the options for the Type 45 replacement, which is an air defence destroyer, is to expand on what Canada has done beyond the 26s. Basically, Canada decided that their 26s would be more capable in air defence than RN and RAN, because both of those navies have dedicated AAW platforms.
Of note, Flight 1 and early Flight 2 Burkes had no hangars, so could not embark a helo, only recover it. So they had their limitations. They tried to use the Burke to replace everything including the OHPs, Spruances, and Ticos, and that has made them very expensive ships. Hence the Constellation class.
I can be very critical of the RCN, but in this case they’ve so far been able to push a very capable all round ship, in relatively large numbers, and a single configuration. The number of cells for area air defence Standards may prove to be of concern, but there will be plenty of quad packed ESSMs for self defence.