sat or act

i have taken sat twice but when scores dropped in the second attempt. i am good at maths and sciences but a bit weak in English. should i give third attempt of the SAT exam or give the ACT exams???

scores in 1st attempt - 800, 630,610 (maths, writing, cr)
scores in 1st attempt - 780, 560,560 (maths, writing, cr)

Try the ACT, under timed test conditions, and see what your scores are. I suspect you will do very well!