Hi guys, not often I post here these days, but wonder if someone may be able to help confirm (or otherwise) a query?

I had a Garador GD11 installed for our 4.85 x 21.meter Cedar Sectional garage door. From the initial installation it seemed to struggle, despite the soft start facility. When I queried this with a few other companies, they said they would have specified the GD09 which is a heavier duty motor. 

After several calls and emails back to the installer (going back months - July), they have finally replaced the GD11 with the GD09 - or have they? When the installer demonstrated the newly installed motor for the first time about 30 minutes ago, it still seemed to struggle. Possibly I'm being paranoid, but the new unit looks EXACTLY like the old unit . . . and (here's the paranoia), the specification sticker looks like it may have been stuck on - it's wrinkled and not perfectly in place as the previous motors' sticker was. The box they bought the new motor in, was opened when it arrived.

Am I actually being paranoid, or have I been duped. The relations between myself and the installation company have not been the best, and I'm now a little concerned that I may still have a GD11 - despite the specification sticker saying otherwise.

Does anyone know if there are any physical differences between the two units? Cowling dimensions, cowling moulding etc? What about inside, would I see anything inside which may confirm one way or another?

Thanks for any input on this.

Below are photo's of the "New GD09" . . . or is it still a GD11?