I used fina (home conversion) and tren from ugl. The first times I used it I noticed my strength went up a lot, but I didn't have a lot of experience with other stuff.
With more experience, I can say that tren is the best for cutting. It stripped all the fat off of me while eating to gain. However, it made me feel terrible the last time. Deca was definitely better for strength gains and overall well being. While on tren, my muscles felt tight all the time, sometimes almost painful. Stretching was very difficult. I went to a massage therapist, and she said that my muscles felt like rock. Sounds good on the surface, but it didn't feel good. It made training more difficult, caused joint pain, and it made the injections more difficult. My strength is definitely better on deca. Of course, you have to consider dosage when comparing. Maybe some people who think tren gives better strength gains don't take enough deca.
Bottom line: if you really want to cut, use tren. Otherwise, use deca. Of course, you'd be using test with either one.