Scientifically speaking they are a molecule apart, so if the dosing is correct they are not any different.
I like them both. I think a lot of UG's underdose thier Tren E and a lot of bros make their own Tren A from Fina. Which is why I think a lot of people like Tren A better. They are really getting 100mg/ml w/ the converted pellets.
With that said, pinning ed gets old. Especailly if you are running GH or any peptides. I did a long Test E/Tren E run on a blen that was 200/200 and I really enjoyed it. I was running 1cc EOD and it worked great. I was also running some Prop EOD b/c I like to run a smidge more test than tren.