If you emphasize on the Physics and Chemistry portions of the NEET and compare it to MHTCET then it will help you a bit in your MHTCET preparation. But MHTCET will have Mathematics as a subject. So you have to focus equally on the portions of the Mathematics. Thus for Physics and Chemistry there can be a bit of help from NEET preparation but its not that beneficial compared to JEE preparation. If you have average JEE Preparation then MHTCET becomes easy for the aspirants. Thus I would say if you are aiming MHTCET then not only do the preparation of NEET only but emphasize some time on the MHTCET syllabus also.

To know more about MHTCET visit the link below:

https://www.careers360.com/exams/mht-cet

TO know more about NEET visit the link below:

https://medicine.careers360.com/articles/neet

I hope this answer helps. All the very best for your future endeavors!