Yes and No.... the grade and materials are the same (CXL Steerhide) ... but the colours are subtley different in anything other than Black. Details as far as I am aware are as follows :
Grade - CXL Steerhide ( this has a std. graded thickness between 1.5 and 3oz ( from Nick at Horween))
Aero Colours
Black, Brown and Cordovan
Alexanders Colours
Black, Havanah Brown and Burgundy
In my experience the colour pallate is a little variable with both the browns and the Cordovan / Burgundy's varying from very dark to quite light in each colour depending on the batch. They are ALL, however, very nice leathers.
In addition, both offer, from time to time, special CXL colourways and weights .. but the above are the std. colours for CXL as far as I'm aware.