Well, statements like "tren is 2x as anabolic as test" is based on a milligram per milligram basis. What is also true, however, is that tren is less effective than test in terms of total dosage.
For example if you take:
600 mgs per week of test
600 mgs per week of tren
In my opinion, adding X mgs of test will probably be more beneficial than adding X mgs of tren.
I'd say Needsize is still correct.