No you cannot say that my Comté affiné 36 mois is a slice of gruyere instead.
This is heresy!
I'm from a less cheese-y part of Europe, but isn't Comté often called Gruyère de Comté for a reason? Of course they'll taste very different when aged for very different amount of times, but I've found them to be decently similar when aged for similar amounts of time.
You specify the range of age you want when you buy comté.
For Gruyère, I never saw that, but it might be because I grew up a few hours from where it’s made.
To clarify : real gruyère is a great cheese. But comte is one of my favorite.
Man I miss cheese.