Neither of the companies own any airplanes and uses Rainbow Air's aircraft and facilities. I did my PPL with UKFT and they explained very clearly to me that JAR Compliant PPL is a FAA PPL with aviation law and RT licence. They also offer the full JAA PPL option add on for FREE..
I liked the package that they offered as it included everythig without any suprises. I personally think it will be tough to find a price of $5000 for a PPL whether its JAA or a FAA PPL.
This is a useful link from CAA's website:
http://www.caa.co.uk/srg/licensing/faq.asp?faqid=208