As others have said - visit both and have a good look round including the aircraft themselves. Even have a trial lesson in each to ensure you make the choice to suit you.
Airways Flying Club use Piper Warriors but also have a new Tecnam P2002 on the fleet which I think you'll find is a very similar price to WAC Cessna 152s.
Costings can be deceptive. As well as the hourly flying rate (including or not the VAT) ask if there are landing fees, fuel surcharges, briefing costs, ground and flying exam costs as well as membership charges. Sometimes the advertised price isn't the invoiced price...
Edit to say - one other thing to check is how the hourly rate is calculated. Some use engine running time others use 'brakes on to brakes off' - ie you pay for what you actually log in your log book.