If you wish you can give both the examination. See there is a saying in law entrance preparation that if anyone prepare well for CLAT then he/she can crack any law entrances. So prepare for CLAT and you can apply for most of the entrances.

To know more about CLAT preparation visit the link below:

https://law.careers360.com/articles/clat-preparation-tips

To know more about MHTCET preparation visit the link below:

https://engineering.careers360.com/articles/mht-cet-preparation-plan-and-tips

I hope this helps.