I think this is the same thing but called differently on different menus. :)

Blackened Crab Cakes - description
Source: Ruby Tuesday's

Seasoned crab cakes blackened on the grill and served with remoulade.

Jumbo Lump Crab Cake - description
Source: Ruby Tuesday's

Full of fresh, tender, jumbo lump crabmeat. Accented with a sweet and spicy chile sauce.

Coastal Crabcakes – Seasoned crab cakes full of tender
crabmeat, seared on the grill and served with remoulade
sauce. Our own signature recipe!

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I did find this note:
Source: Ruby Tuesday Employee

Ruby Tuesday also now has a premium "Jumbo Lump Crabcake." The crabcake is mixed fresh daily. There is roughly a 4:1 ratio of crabmeat to breading. There is no artificial crabmeat at all, only canned crabmeat.