Hey everyone just a question

I have 12 ml sust and 12ml e I'm planing on running 500mg a week. uestion is, instead of running test e for ten weeks or just sust for ten weeks could I just do sust and e for ten weeks I kno there bot lagit and human grade and don't want to risk gettin another ten ml of ugl stuff just incase its bunk.

I won't be running this for a while so don't worry about stats
Thanks