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Disclaimer: These are my observations using a ETS EC 125, however the form factor is almost identical to a ETS EC 150.
The Turbo dust bag 489129, will not fit on a ETS EC 125 because of the 7/16" extension on the dust port. See the photo above.
However, I did conduct some tests and determined that the suction on the ETS EC 125 was almost twice that on the ETS 125. I'd hazard a guess that the ETS EC 150 is similar in performance.
So, if a Turbo bag could be fitted to a ETS EC 125, I'd wager that it will do a much better job than the ETS 125.