I think though they were already FAR bigger than Laverda ever was when they started diversification while Laverda actually CAME from diversification... Main business was casting (church bells and other parts, made of alloy etc.) and agrecultural (mechanic) machines. Pedro Laverda was a bike enthusiast and his contribution was to motorize the agrecultural machines. He build a business out of his passion for bike racing, never intended really to build a bike factory, while Honda built engines long before they started building bikes or cars.
On Honda, everything was under the control of one man while Laverda Family business was devided already into several companies and not let/controlled centrally. Remember the interview with Massimo beginning of the 80's where he clearly said that Moto Laverda was in financial problems and that the family did not agree to invest more money into it (after these costy experiments of the 4-wheel and V6 disasters), which clearly did not help to further develop the already started projects (600ccm and 900ccm water cooled 4-valve engines). Emission rules got tighter, the japs built better frames (Deltabox etc.), Brembo wasn't the only brake company to build good brakes anymore and Laverda was not able to answer to it at the speed needed, especially as it was a company in a socialistic country. Government took over and you know what allways happens when government takes control...

People come in that have no clue of the business to make decissions for a company they have no sense for.