Fingertips is ideally for you to practise NCERT based questions. MTG Guide is to practise those questions based on the syllabus. Now 99% of the questions in NEET come from NCERT syllabus and so that way Fingertips might be useful. But guide is a detailed book for you to get your basics correct. So if you have already studied NCERT for your board exams and have good foundation, you can go for Fingertips. But what you need to remember is the questions might be twisted and so it is important to have strong basics. Other than MTG, few books that are good for preparing for Chemistry for NEET are:

NCERT Chemistry textbooks for Class XI and XII
Physical Chemistry by OP Tandon
ABC of Chemistry for Classes 11 and 12 by Modern
Concise Inorganic Chemistry by JD Lee
Dinesh Chemistry Guide
Practise books by VK Jaiswal, MS Chauhan and N Awasth

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