Moftah, that is a great question. I have these red roses: Canadian Shield, Emily Carr, Champlain, Quadra, Hansaland & I’d also say Cuthbert Grant is a deep burgundy red. I’ll include Never Alone too, although it has hints of white.
They’re all different in their own way so it’s hard to say which one is better than the others. It also depends on what is important to you.
Below are observations based on what I have, but experiences from other gardeners might be different due to soil conditions, care, microclimate, etc:
Best bush form - Emily Carr
Worst bush form - Champlain (does better with staking)
Tallest bush - Emily Carr
Shortest bush - Never Alone
Most vigorous grower - Canadian Shield or Emily Carr
Weakest grower - Never Alone, Champlain, Cuthbert Grant
Shiniest leaves - Never Alone (this plant is worth getting just for it’s dark shiny leaves)
Most dull leaves - Emily Carr (leaves are more green-yellow toned) or Cuthbert Grant (leaves are more green-blue)
Most cane hardy - Hansaland
Least cane hardy - Champlain, Cuthbert Grant
Bloom shape most like a hybrid tea - Canadian Shield, Emily Carr or Never Alone
Bloom shape most flat/ruffled - Champlain, Hansaland, Quadra
Most fragrance - Cuthbert Grant (but still only a mild to moderate fragrance)
Least fragrant - Almost all of them except Cuthbert Grant
Most floriferous/most blooms - Champlain (the plant often looks like it has as many blooms as leaves)
Least blooms - Emily Carr (but it’s not in the best soil for me)
Most disease resistant - Canadian Shield or Hansaland
Least disease resistant - Champlain (always gets covered in blackspot for me)
Most continuous blooms (buds continuing to form as flowers are fading) - Emily Carr, Canadian Shield or Champlain
Least continuous blooms (blooms in a flush) - Cuthbert Grant (has about two or three distinct flushes, with clear periods of only green growth)
Longest lasting blooms - Emily Carr, Canadian Shield or Never Alone
Shortest lasting blooms - Hansaland
Largest blooms - Cuthbert Grant (they are big and globular almost like a peony. Sadly they are so big they droop down quite a bit because their stems are weak), Quadra
Smallest blooms - Emily Carr, Never Alone
Most petals - Canadian Shield, Quadra
Least petals - Emily Carr or Cuthbert Grant
Out of the above, my favourite is Cuthbert Grant because fragrance is really, really important to me.
I don’t have the red roses Henry Kelsey or Hope for Humanity, but I’ve read good things about them.
Q