Either one Bro. Everybody reponds differently to AS. Whether you do Equ or Dec they're both long acting esters as well as Test Enan. If you decide on Equ I would consider frontloading for the first couple of weeks. That'll get your blood concentration levels up quicker. Eqi and Test Enan take about 4 weeks to start kicking in.
I get the best results with Equi when I frontload. I'll take between 600-800 mg/week for 2 weeks and then lower that dose to 300-400 mg/week for the remaining 10-12 weeks.
300-400 mg a week of Equi with 500 mg of Test enan would form an incredible stack. Also, Equi is stronger than Deca, mg for mg, as well as safer and less suppressive. Deca shuts down you natural production of Testosterone pretty hard.