The price is pretty much the same these days.
EDIT: Just checked, a box of 305m cat5e from a Swindon local supplier is £65, same box in cat6 is £95. Goes without saying you aren't going to need 305m of cable for an ordinary house.
Similar price difference I guess. Got this, so £58 per 100m for cat6 and £38 for cat5e. Saving a fortune might be a touch of an exaggeration.
https://www.amazon.co.uk/dp/B01GK898I0Do you live in a fucking mansion?
Haha, it’s just the width of a single room and all in a line. Plus the sparky has left about 5m of slack per cable - currently curled up in my kitchen.