Asking this question makes me feel like you need to put some more time into research. You're asking if you can stack tren with tren? I'd just pick one based on the esters of the other compounds you're running.
please dont use tren man... you dont have any idea what you are doing to ask a question like that... its great to ask questions but this is just scary that you are considering using tren and you dont even know what you are doing or asking.. why would you stack tren with tren??? that doesn't even make sense...