The real cost of lessons
apart from the headline price there are other "costs" that you need to consider when you go anywhere US or UK.
For instance if you have a change of instructor you will have some time and cost in bringing your new instructor up to speed with your level of ability. That change may happen more than once depending upon where you and may even be a policy of the organisation not to send you with the same instructor.
How many aircraft and instructors do the organisation have - non availability of either for your lesson is going to mean a step backwards which will be greater in proportion to the time between lessons.
Does the headline rate include the necessary ground brief and debrief or is that charged seperately. Mostly in the UK I find it does but in the US it does not - and ask there if the instructor is actually paid for ground time - if not you may guess how much of a brief / debrief you might end up with. Of course if you are on a package deal it may be different.
Personally I prefer the intensive learning route and for that I went to to the US and flew solidly to do both PPL and IR. Makes the investment in your time and airfares more efficient - if it suits your style of learning.