Infact, diagrams and European carts don't work very well with those systems so small,but only in east Atlantic and Mediterranean sea. For the west and central Atlantic cyclones are many other study and carts (and the NHC).
Many little tropical storm or depression like in dimension at these Canary cyclone.
Like in structur as many tropical depression or storm,with thunderstom activity little north-north east of the center:
The structure egual..
And for me have a warm core. Thunderstorm activity not possible in cold core cyclones center.
Look Tropical Storm Ernesto 1-2-3 September 2000
And the Canary unnamed cyclone 15-16-17-18-19 Jun 2009: