To say an octet is in hex is no more wrong than to say some number is stored as a float. It's all just a bucket of bits. Hex or float or Integer are always presentation 

Float or integer is definitely not a matter of presentation but of encoding. Floats are stored encoded as sign, mantissa, and exponent.
https://softwareengineering.stackexchange.com/questions/215065/can-anyone-explain-representation-of-float-in-memory

Integer versus fixed point is a matter of presentation perhaps, but not floating point.

Hamish