Hi Freddie,
The first trainer is just about exactly the same as the standard tacx trainer which costs some £150,
the other trainer has an adjustable tensioner to make pedalling more harder or easier.
Remember with these sort of trainers its advisable to have a training tyre as its harder
and creates less noise than a standard road tyre. The tyre which is used for the trainer
is not designed for the road because its harder and will not grip the road.
There are 'other' turbo trainers on the market besides the Tacx one but they soon get fooked up
after a few thousand miles where as the Clarkes run forever.