I would say both are an enormous waste of money.
Privatized tutoring to each individual content on the MCAT exists, and it is free. Go to KhanAcademy. If you're dying for individualized tutoring, go to craigslist and find one of the numerous candidates willing to do so in person (but not through a test prep company) or over the internet for 1/10th of the price.
If you need more practice, purchase TBR books, find TPR's science & CARS workbooks secondhand, and/or simply purchase practice tests from NextStep or EK for content review and reinforcement.
The tutors at Kaplan & TPR (1) haven't been educated as science instructors (they're generally smart pre-meds or post-grads that have done well on the MCAT... not people who have received Master's degrees in education), (2) charge an exorbitant fee per hour (15 hours on Kaplan costs $4000 dollars. That is clinically insane to charge or to pay.), and (3) nah, just re-read (1) and (2).
Additionally, all Kaplan and TPR material is built around the concept of getting you to buy their 'complete' MCAT study package. It is very hard to study for the MCAT using just their books, because their books are meant to be supplemented by their in-class materials.
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I'd start off scrapping what you know and buying the new full set of books from EK, reinforce material using KhanAcademy, and learn CARS strategy using TestingSolutions (free & on this website).
Please don't throw away your money.